Promethium is a chemical element with the symbol Pm and atomic number 61. It is one of the rarest and most elusive elements, typically found in trace amounts in uranium ores. Promethium is radioactive, and it doesn't have any stable isotopes, making it challenging to obtain in significant quantities. Its most notable application is in nuclear batteries, where the radioactive decay of promethium is harnessed to produce a steady source of low-level thermal energy for various applications, such as powering spacecraft instruments and remote sensors.

Atomic Weight: 145
Melting Point: 1042°C
Boiling Point: 3000°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f⁵6s²
Common Oxidation States: 3
Number of Valence Electrons: 7

Samarium, with the atomic number 62, is a rare earth element found in the lanthanide series of the Periodic Table. It possesses unique magnetic properties and is often used in the production of strong permanent magnets, especially in high-temperature applications such as electric motors and generators. Samarium compounds, like samarium cobalt magnets, are crucial components in various technological advancements, making this element indispensable in the field of materials science and electronics.

Atomic Weight: 150.4
Melting Point: 1074°C
Boiling Point: 1794°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f⁶6s²
Common Oxidation States: +3,2
Number of Valence Electrons: 2

Europium (symbol Eu, atomic number 63) is a rare earth element known for its unique magnetic and luminescent properties. It is a silvery-white metal that, when exposed to air, readily oxidizes and tarnishes. Europium is crucial in the production of red and blue phosphors for color television screens and LED lighting, as it emits a deep red glow when bombarded with electrons. Additionally, it plays a vital role in nuclear reactor control rods, where its strong ability to absorb neutrons helps regulate nuclear fission reactions.

Atomic Weight: 152.00
Melting Point: 822°C
Boiling Point: 1529°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f⁷6s²
Common Oxidation States: +3,2
Number of Valence Electrons: 2

Gadolinium (Gd) is a chemical element with the atomic number 64 and belongs to the lanthanide series of the Periodic Table. It is known for its unique magnetic properties, particularly in the form of gadolinium-based contrast agents used in magnetic resonance imaging (MRI) due to its ability to alter the relaxation times of nearby water protons, enhancing image contrast. Gadolinium also has a high neutron capture cross-section, making it useful in nuclear reactors for controlling nuclear reactions and as a neutron shield in various applications.

Atomic Weight: 157.3
Melting Point: 1313°C
Boiling Point: 3273°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f⁷5d¹6s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Terbium, represented by the chemical symbol Tb and atomic number 65, is a rare earth element found in the lanthanide series of the Periodic Table. Terbium is notable for its distinctive bright green fluorescence under certain conditions, making it valuable in the production of phosphors for color television tubes and fluorescent lamps. Additionally, it is employed in the development of powerful magnets, particularly in the form of terbium-dysprosium alloys, which find applications in various technologies, including hybrid vehicles and wind turbines. 

Atomic Weight: 158.9
Melting Point: 1365°C
Boiling Point: 3230°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f⁹6s²
Common Oxidation States: +3,4
Number of Valence Electrons: 2

Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element that belongs to the lanthanide series of the Periodic Table. Dysprosium is known for its strong magnetic properties, making it a critical component in the production of high-strength permanent magnets used in various applications, including electric vehicle motors and wind turbines. Additionally, dysprosium has a high neutron-absorbing capacity, rendering it vital for control rods in nuclear reactors to regulate nuclear fission processes.

Atomic Weight: 162.5
Melting Point: 1412°C
Boiling Point: 2567°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁰6s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Holmium (Ho) is a chemical element with the atomic number 67, making it part of the lanthanide series within the Periodic Table. It is a rare-earth metal known for its silvery-white appearance. Holmium is notable for its strong magnetic properties, especially when combined with other rare-earth elements, and is used in various high-strength permanent magnets, such as those found in some medical devices and scientific instruments.

Atomic Weight: 164.9
Melting Point: 1474°C
Boiling Point: 2700°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹¹6s²
Common Oxidation States: +3
Number of Valence Electrons: 3

Erbium (Er) is a chemical element with the atomic number 68, positioned in the lanthanide series of the Periodic Table. It is a silvery-white, soft, and malleable metal. Erbium is notable for its strong absorption of certain wavelengths of light, making it a crucial component in the production of fiber optic communications, where it amplifies signals in the infrared range, and it is also used in the manufacturing of phosphors for color television tubes and in certain types of nuclear reactors due to its ability to capture neutrons.

Atomic Weight: 167.3
Melting Point: 1529°C
Boiling Point: 2868°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹²6s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Thulium (Tm) is a rare-earth element with the atomic number 69, situated in the lanthanide series of the Periodic Table. It is notable for being one of the least abundant naturally occurring lanthanides. Thulium is a soft, silvery-gray metal with unique magnetic properties, as it becomes ferromagnetic at extremely low temperatures. This element is used in specialized applications, such as portable X-ray devices and as a dopant in high-efficiency laser materials, owing to its ability to emit highly efficient and easily tunable infrared light.

Atomic Weight: 168.9
Melting Point: 1545°C
Boiling Point: 1950°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹³6s²
Common Oxidation States: +3,2
Number of Valence Electrons: 2

Ytterbium is a chemical element with the symbol Yb and atomic number 70. It belongs to the lanthanide series and is a rare earth metal. Ytterbium is known for its exceptional magnetic and optical properties, making it valuable in various applications, including laser technology and as a component in certain alloys.

Atomic Weight: 173.04
Melting Point: 819°C
Boiling Point: 1196°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴6s²
Common Oxidation States: +3,2
Number of Valence Electrons: 2

Lutetium, with the chemical symbol Lu and atomic number 71, is a rare and heavy transition metal in the Periodic Table. It is the last naturally occurring element in the lanthanide series and is known for its high density and resistance to corrosion. Lutetium is often used in various scientific and industrial applications, such as as a catalyst in the petrochemical industry and as a component in radiation therapy for cancer treatment due to its ability to emit beta particles.

Atomic Weight: 175.00
Melting Point: 1663°C
Boiling Point: 3402°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹6²
Common Oxidation States: +3
Number of Valence Electrons: 2

Hafnium (Hf) is a transition metal located in period 6, group 4 of the Periodic Table. It possesses an atomic number of 72 and shares many chemical similarities with zirconium, which is located just above it in the table. Hafnium is notable for its exceptionally high melting point, resistance to corrosion, and its importance in the nuclear industry, where it is used as a neutron-absorbing material in control rods for nuclear reactors.

Atomic Weight: 178.5
Melting Point: 2227°C
Boiling Point: 4600°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d²6s²
Common Oxidation States: +4
Number of Valence Electrons: 4

Tantalum (Ta), with the atomic number 73, is a dense, transition metal found in the d-block of the Periodic Table. It is renowned for its exceptional resistance to corrosion, making it a valuable material for various industrial applications, particularly in the production of capacitors and superalloys for high-temperature environments. Tantalum's high melting point, excellent conductivity, and biocompatibility also render it crucial in the field of electronics, aerospace, and medical devices, contributing to its significance in modern technology and engineering.

Atomic Weight: 180.9
Melting Point: 2996°C
Boiling Point: 5425°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d³6s²
Common Oxidation States: +5
Number of Valence Electrons: 5

Tungsten, with the chemical symbol W and atomic number 74, is a transition metal renowned for its exceptional properties. It possesses the highest melting point of any element, standing at 3,422 degrees Celsius, and is incredibly dense, with a density of 19.25 grams per cubic centimeter. Tungsten is also a critical element in modern technology, extensively used in electrical filaments, high-temperature applications, and as a key component in the production of steel alloys, making it indispensable in various industrial and scientific contexts.

Atomic Weight: 183.8
Melting Point: 3410°C
Boiling Point: 5660°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d⁴6s²
Common Oxidation States: +6,4
Number of Valence Electrons: 6

Rhenium is a chemical element with the atomic number 75 and the symbol Re. It is a dense, silvery-white, transition metal found in Group 7 of the Periodic Table. Rhenium is notable for its extremely high melting point, exceptional resistance to heat and corrosion, and its critical role as a catalyst in various chemical reactions, including the hydrogenation of fine chemicals and the petroleum industry.

Atomic Weight: 186.2
Melting Point: 3180°C
Boiling Point: 5600°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d⁵6s²
Common Oxidation States: +7,4,6
Number of Valence Electrons: 7

Osmium (Os), with an atomic number of 76, is a dense and lustrous transition metal located in the platinum group of the Periodic Table. It is renowned for its exceptional density, being the densest naturally occurring element, which makes it a crucial material in the manufacturing of fountain pen tips and instrument pivots. Osmium's chemical properties include remarkable resistance to corrosion and a tendency to form stable tetroxide OsO4, which has applications in organic synthesis and staining biological specimens for electron microscopy.

Atomic Weight: 190.2
Melting Point: 3045°C
Boiling Point: 5030°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d⁶6s²
Common Oxidation States: +4,6,8
Number of Valence Electrons: 8

Iridium (Ir) is a chemical element with the atomic number 77, and it is situated in the platinum group of the Periodic Table. It is an extremely dense and hard metal, known for its exceptional resistance to corrosion, even at high temperatures, making it invaluable in various industrial and scientific applications. Iridium's most notable use is in spark plugs due to its high melting point and durability, ensuring reliable ignition in internal combustion engines.

Atomic Weight: 192.2
Melting Point: 2410°C
Boiling Point: 4130°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f145d76s2
Common Oxidation States: +4,3,6
Number of Valence Electrons: 9

Platinum, with the atomic number 78 and symbol Pt, is a dense and lustrous transition metal known for its remarkable chemical stability. It possesses exceptional resistance to corrosion and oxidation, making it an indispensable material in various industrial applications, particularly as a catalyst in chemical reactions. Due to its rarity and valuable properties, platinum is highly sought after for use in jewelry and in critical roles such as catalytic converters in automobiles, where it facilitates the conversion of harmful emissions into less harmful compounds, contributing to environmental protection.

Atomic Weight: 195.1
Melting Point: 1772°C
Boiling Point: 3827°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d⁹6s¹
Common Oxidation States: +4,2
Number of Valence Electrons: 2

Atomic Weight: 197.00
Melting Point: 1064°C
Boiling Point: 3080°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s¹
Common Oxidation States: +3,1
Number of Valence Electrons: 1

Atomic Weight: 200.6
Melting Point: -38.9°C
Boiling Point: 357°C
Phase at STP: Liquid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²
Common Oxidation States: +2,1
Number of Valence Electrons: 2

Thallium is a chemical element with the symbol Tl and atomic number 81. It is a soft, bluish-white metal that falls within the post-transition metals category of the periodic table. Thallium is notable for its high toxicity and has limited industrial applications, primarily in the electronics and optics industries, as well as in some specialized scientific research.

Atomic Weight: 204.4
Melting Point: 303°C
Boiling Point: 1457°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p¹
Common Oxidation States: +1,3
Number of Valence Electrons: 3

Thallium is a chemical element with the symbol Tl and atomic number 81. It is a soft, bluish-white metal that falls within the post-transition metals category of the periodic table. Thallium is notable for its high toxicity and has limited industrial applications, primarily in the electronics and optics industries, as well as in some specialized scientific research.

Atomic Weight: 207.2
Melting Point: 327.5°C
Boiling Point: 1740°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p²
Common Oxidation States: +2,4
Number of Valence Electrons: 4

Bismuth, with the chemical symbol Bi and atomic number 83, is a heavy metal that belongs to the group 15 of the periodic table. It is notable for its distinct pinkish-white hue and its status as one of the most diamagnetic elements, meaning it is strongly repelled by magnetic fields. Bismuth is also known for its low toxicity, making it suitable for a range of applications, including pharmaceuticals, cosmetics, and as an alloying agent in various industries.

Atomic Weight: 209.00
Melting Point: 271°C
Boiling Point: 1560°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p³
Common Oxidation States: +3,5
Number of Valence Electrons: 5

Polonium is a chemical element with the symbol Po and atomic number 84. It is a highly radioactive element and is part of the chalcogen group on the periodic table, which also includes oxygen, sulfur, selenium, and tellurium. Polonium was discovered by Marie Curie and her husband Pierre Curie in 1898 and is primarily known for its extreme radioactivity, emitting alpha particles that can be harmful to living organisms.

Atomic Weight: (209)
Melting Point: 254°C
Boiling Point: 962°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p⁴
Common Oxidation States: +4,2
Number of Valence Electrons: 6

Astatine is a chemical element with the symbol "At" and atomic number 85. It is a member of the halogen group on the periodic table, making it chemically similar to iodine, chlorine, and fluorine. Astatine is a highly radioactive element, and due to its scarcity and short half-life isotopes, it is primarily of interest to researchers studying nuclear physics and radiochemistry.

Atomic Weight: (210)
Melting Point: 302°C
Boiling Point: 337°C
Phase at STP: Solid
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p⁵
Number of Valence Electrons: 7

Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive noble gas, and one of the heaviest known gases. Radon is formed as a decay product of uranium and thorium, and it is colorless, odorless, and tasteless. Due to its radioactive nature, radon poses health risks when it accumulates in enclosed spaces, as its decay products can be inhaled and potentially damage lung tissue, making it important to monitor and mitigate its presence in indoor environments.

Atomic Weight: (222)
Melting Point: -71°C
Boiling Point: -61.8°C
Phase at STP: Gas
Electronic Configuration: [Xe]4f¹⁴5d¹⁰6s²6p⁶
Common Oxidation States: 0
Number of Valence Electrons: 8

Francium is an extremely rare and highly radioactive chemical element with the atomic number 87 and symbol Fr. It belongs to the alkali metal group in the periodic table, making it a member of the same family as sodium and potassium. Francium is known for its extreme instability and short half-life, primarily due to its tendency to undergo rapid radioactive decay. Due to its scarcity and radioactivity, it has limited practical applications and is primarily studied for its fundamental properties in nuclear physics and atomic research.

Atomic Weight: (223)
Melting Point: 27°C
Boiling Point: 677°C
Phase at STP: Solid
Electronic Configuration: [Rn]7s¹
Common Oxidation States: +1
Number of Valence Electrons: 1

Radium is a highly radioactive chemical element with the symbol Ra and atomic number 88. It is a member of the alkaline earth metal group and is found in trace amounts in uranium ores. Radium is known for its intense radioactivity, emitting alpha, beta, and gamma rays, and it was famously used in luminescent paint in the early 20th century. However, due to its extreme radioactivity and associated health risks, its applications have been greatly restricted, and it is primarily of historical and scientific interest.

Atomic Weight: (226)
Melting Point: 700°C
Boiling Point: 1140°C
Phase at STP: Solid
Electronic Configuration: [Rn]7s²
Common Oxidation States: +2
Number of Valence Electrons: 2

Actinium is a chemical element with the symbol Ac and atomic number 89. It belongs to the actinide series, a group of elements in the periodic table, and is primarily known for its radioactive properties. Actinium-227, its most stable isotope, decays into thorium-227 through alpha decay, emitting high-energy radiation, making it valuable in the field of nuclear physics and as a neutron source for scientific research.

Atomic Weight: (227)
Melting Point: 1050°C
Boiling Point: 3200°C
Phase at STP: Solid
Electronic Configuration: [Rn]6d¹7s²
Common Oxidation States: +3
Number of Valence Electrons: 3

Thorium is a radioactive chemical element with the symbol Th and atomic number 90. It is named after the Norse god Thor and is a silvery-white, actinide metal found in small amounts in Earth's crust. Thorium is notable for its potential use as a nuclear fuel in advanced reactors due to its abundant availability and its ability to undergo controlled fission, which can provide a sustainable and efficient energy source while producing less long-lived radioactive waste compared to traditional uranium-based nuclear reactors.

Atomic Weight: (232)
Melting Point: 1750°C
Boiling Point: 4790°C
Phase at STP: Solid
Electronic Configuration: [Rn]6d²7s²
Common Oxidation States: +4
Number of Valence Electrons: 4

Protactinium, with the chemical symbol Pa and atomic number 91, is a radioactive transition metal in the actinide series of the periodic table. It was discovered in 1913 by Kasimir Fajans and Oswald Helmuth Göhring. Protactinium is primarily obtained as a decay product of uranium and thorium, and its most stable isotope, protactinium-231, has a half-life of approximately 32,760 years. This element plays a crucial role in the study of nuclear reactions and is used in the production of certain isotopes for research and medical applications.

Atomic Weight: 231.00
Melting Point: 1570°C
Boiling Point: 4000°C
Phase at STP: Solid
Electronic Configuration: [Rn]5f²6d¹7s²
Common Oxidation States: +5,4
Number of Valence Electrons: 5

Uranium is a radioactive element with the atomic number 92 and symbol U on the periodic table. It is a heavy, silvery-white, naturally occurring metal that is notable for its radioactive properties. Uranium's most abundant isotope, uranium-238, undergoes radioactive decay, emitting alpha particles and ultimately decaying into stable lead-206, making it a key component in nuclear reactors and weapons due to its ability to sustain a nuclear chain reaction.

Atomic Weight: 238.00
Melting Point: 1132°C
Boiling Point: 3818°C
Phase at STP: Solid
Electronic Configuration: [Rn]5f³6d¹7s²
Common Oxidation States: +6,3,4,5
Number of Valence Electrons: 6

Neptunium is a synthetic chemical element with the symbol Np and atomic number 93. It is part of the actinide series of the periodic table and is typically produced in nuclear reactors through the bombardment of uranium-238 with neutrons. Neptunium exhibits multiple oxidation states, with Np(VI) and Np(V) being the most common, and it is of significant interest in nuclear science due to its role in the production of plutonium-239, a key component in nuclear weapons and nuclear reactor fuel cycles.

Atomic Weight: (237)
Melting Point: 640°C
Boiling Point: 3900°C
Phase at STP: Solid
Electronic Configuration: [Rn]5f⁴6d¹7s²
Common Oxidation States: +5,3,4,6
Number of Valence Electrons: 7

Plutonium is a transuranium element with the chemical symbol Pu and atomic number 94. It is a radioactive, silvery-gray metal known for its use in nuclear reactors and the production of nuclear weapons. Plutonium-239, one of its isotopes, is fissile and can sustain a nuclear chain reaction, making it a crucial component in both civilian and military nuclear applications.

Atomic Weight: (244)
Melting Point: 641°C
Boiling Point: 3232°C
Phase at STP: Solid
Electronic Configuration: [Rn]5f⁶7s²
Common Oxidation States: +4,3,5,6
Number of Valence Electrons: 2

Americium is a synthetic chemical element with the symbol Am and atomic number 95. It was first synthesized in 1944 by the American scientists Glenn T. Seaborg, Ralph A. James, and Leon O. Morgan. Americium is primarily used in the creation of ionization chamber smoke detectors due to its strong radioactive properties, emitting alpha particles that can ionize the air and detect smoke, making it a valuable element in enhancing fire safety.

Atomic Weight: (243)
Melting Point: 994°C
Boiling Point: 2607°C
Phase at STP: N/A
Electronic Configuration: [Rn]5f⁷7s²
Common Oxidation States: +3,4,5,6
Number of Valence Electrons: 2

Curium is a synthetic chemical element with the symbol Cm and atomic number 96. It was first synthesized in 1944 by the American researchers Albert Ghiorso, Ralph A. James, and Glenn T. Seaborg. Curium is a radioactive element, and its isotopes are primarily produced in nuclear reactors. It has a variety of applications, particularly in the creation of neutron sources for scientific research and as a target material for the synthesis of heavier elements.

Atomic Weight: (247)
Melting Point: 1340°C
Boiling Point: N/A
Phase at STP: Solid
Electronic Configuration: [Rn]5f⁷6d¹7s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Berkelium is a synthetic chemical element with the atomic number 97 and the symbol Bk. It belongs to the actinide series on the periodic table, making it a radioactive, heavy metal. Berkelium is primarily produced in nuclear reactors and is known for its limited practical applications, mainly in research and as a target material for the synthesis of even heavier elements. Its most stable isotope, Berkelium-247, has a half-life of about 1,380 years, making it challenging to study and handle.

Atomic Weight: (247)
Melting Point: 986°C
Boiling Point: N/A
Phase at STP: Solid
Electronic Configuration: [Rn]5f⁹7s²
Common Oxidation States: +3,4
Number of Valence Electrons: 2

Californium (Cf) is a radioactive chemical element with the atomic number 98 and symbol Cf. It is a synthetic element and is not found naturally in significant quantities. Californium is primarily produced in nuclear reactors by bombarding curium-242 with neutrons, and its most common isotope, Californium-252, is highly radioactive, emitting intense neutron radiation. Due to its ability to release neutrons, Californium-252 is used in various applications, including neutron radiography, well-logging in the oil industry, and as a neutron source for research and cancer treatment.

Atomic Weight: (251)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹⁰7s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Einsteinium, denoted by the chemical symbol Es and having the atomic number 99, is a synthetic element that does not occur naturally on Earth. It was first synthesized in the mid-20th century as a product of nuclear reactions. Due to its high radioactivity and scarcity, its practical applications are limited, but it has been used in scientific research and as a neutron source for various purposes, including the study of materials and nuclear physics.

Atomic Weight: (252)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹¹7s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Fermium is a synthetic chemical element with the symbol Fm and atomic number 100. It is a member of the actinide series and is part of the periodic table's f-block. Fermium is highly radioactive and is produced in nuclear reactors through the bombardment of heavier elements with neutrons. Its most stable isotope, Fermium-257, has a relatively short half-life of about 100 days and is primarily studied for its role in nuclear physics and scientific research related to heavy elements.

Atomic Weight: (257)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹²7s²
Common Oxidation States: +3
Number of Valence Electrons: 2

Mendelevium is a synthetic element with the atomic number 101 and the symbol Md. It is part of the actinide series and is named after the renowned Russian chemist Dmitri Mendeleev, who contributed to the development of the periodic table. Mendelevium is highly radioactive and is typically produced in nuclear reactors as a byproduct of nuclear reactions involving heavy elements. Due to its extreme instability and short half-life, its practical applications are limited to scientific research in the field of nuclear chemistry.

Atomic Weight: (258)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹³7s²
Common Oxidation States: +3,2
Number of Valence Electrons: 2

Nobelium is a synthetic chemical element with the atomic number 102 and symbol No. It is a highly radioactive element and is not found in nature, requiring the synthesis in particle accelerators. Nobelium was first synthesized in 1958, and its most stable isotope, Nobelium-259, has a half-life of just minutes, making it challenging to study. Due to its extreme instability, very little is known about its chemical properties, and it has no practical applications outside of scientific research.

Atomic Weight: (259)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹⁴7s²
Common Oxidation States: +2,3
Number of Valence Electrons: 2

Lawrencium is a synthetic element with the atomic number 103 and the symbol Lr on the periodic table. It is a highly radioactive and unstable element that has not been observed in significant quantities in nature. Lawrencium is primarily produced in particle accelerators through nuclear reactions involving lighter elements and is named after the American physicist Ernest O. Lawrence, who played a significant role in the development of the cyclotron, a type of particle accelerator. Due to its extreme instability, lawrencium's chemical properties and practical applications remain largely theoretical and unexplored.

Atomic Weight: (262)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹⁴7s²7p¹
Common Oxidation States: +3
Number of Valence Electrons: 3

Rutherfordium is a synthetic chemical element with the symbol Rf and atomic number 104. It was first synthesized in 1969 by a team of scientists at the Joint Institute for Nuclear Research in Russia. Rutherfordium is highly unstable and has a very short half-life, making it challenging to study its chemical properties. It is classified as a transactinide element and is named in honor of the physicist Ernest Rutherford, who made significant contributions to our understanding of nuclear physics.

Atomic Weight: (267)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: [Rn]5f¹⁴6d²7s²
Common Oxidation States: N/A
Number of Valence Electrons: 4

Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. It is a highly radioactive element that was first synthesized in 1968 by a team of scientists at the Joint Institute for Nuclear Research in Russia and at the Lawrence Berkeley National Laboratory in the United States. Due to its extreme instability and short half-life, dubnium's chemical properties remain poorly understood, and its practical applications are limited to scientific research in the field of nuclear physics.

Atomic Weight: (268)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d³7s²
Common Oxidation States: N/A
Number of Valence Electrons: 5

Seaborgium is a synthetic chemical element with the atomic number 106 and symbol Sg. It was first synthesized in 1974 by a team of scientists at the Lawrence Berkeley National Laboratory. Seaborgium is highly unstable and has a very short half-life, making it difficult to study in detail, but its properties are expected to be similar to other elements in the same group, exhibiting metallic characteristics.

Atomic Weight: (269)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d⁴7s²
Common Oxidation States: N/A
Number of Valence Electrons: 6

Bohrium is a synthetic element with the atomic number 107 and the symbol Bh on the periodic table. It was first synthesized in 1981 by a German research team led by Peter Armbruster and Gottfried Münzenberg. Bohrium is highly radioactive and has a very short half-life, making it extremely challenging to study, and its chemical properties remain largely unknown.

Atomic Weight: (270)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d⁵7s²
Common Oxidation States: N/A
Number of Valence Electrons: 7

Hassium, with the chemical symbol Hs and atomic number 108, is an extremely rare and highly unstable synthetic element that was first synthesized in 1984. It is a member of the transactinide series, located in the periodic table, and is typically produced through nuclear reactions involving heavy isotopes of other elements. Due to its short half-life and radioactivity, hassium's chemical properties and potential applications remain largely speculative, making it a subject of continued research in the field of nuclear chemistry.

Atomic Weight: (269)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d⁶7s²
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Meitnerium is a synthetic chemical element with the symbol Mt and atomic number 109. It was first synthesized in 1982 by a team of German scientists. Meitnerium is highly unstable and has a very short half-life, making it challenging to study, and its chemical properties are not well-documented due to its fleeting existence. It is classified as a transactinide element, and its discovery was a significant achievement in the field of nuclear physics and chemistry.

Atomic Weight: (278)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d⁷7s²
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Darmstadtium, with the atomic number 110 and symbol Ds, is a synthetic and highly radioactive element that was first synthesized in 1994 by a team of scientists in Germany. It is part of the transactinide series on the periodic table and is produced by bombarding lead-208 nuclei with nickel-62 ions. Due to its extreme instability and short half-life, Darmstadtium's chemical properties remain largely unexplored, and its practical applications are limited to fundamental research in nuclear physics.

Atomic Weight: (281)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d⁹7s¹
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Roentgenium is a synthetic chemical element with the symbol Rg and atomic number 111. It was first synthesized in 1994 by a team of German and Russian scientists through a highly complex and challenging nuclear reaction. Roentgenium is highly unstable and radioactive, with a very short half-life, making it difficult to study its chemical properties. Its existence and characteristics are mainly theoretical, and its practical applications are currently nonexistent due to its extreme instability.

Atomic Weight: (281)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s¹
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Copernicium, with the atomic symbol Cn and atomic number 112, is a synthetic and highly unstable element that was first synthesized in 1996 by a team of German and Russian scientists. It is classified as a transactinide element, part of the periodic table's seventh period. Due to its extreme instability and short half-life, Copernicium's chemical and physical properties remain largely theoretical, and its practical applications are limited to scientific research in the field of nuclear physics and chemistry.

Atomic Weight: (285)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s²
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Nihonium, with the atomic symbol Nh and atomic number 113, is a highly synthetic and extremely unstable element. It was first synthesized in 2003 by a team of Japanese scientists through a particle accelerator, making it one of the superheavy elements. Nihonium's short half-life and limited availability make it primarily of theoretical and scientific interest, with its chemical properties and applications largely unexplored.

Atomic Weight: (286)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s²7p¹
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Flerovium is a synthetic chemical element with the atomic number 114 and the symbol Fl. It was first synthesized in 1998 by a team of Russian and American scientists at the Joint Institute for Nuclear Research in Russia. Flerovium is highly unstable and has a very short half-life, making it challenging to study its properties. It is classified as a superheavy element and is part of the periodic table's seventh period.

Atomic Weight: (289)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴¹⁰7s²7p²
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Moscovium is a synthetic chemical element with the symbol Mc and atomic number 115. It was first synthesized in 2003 by a team of Russian and American scientists. Moscovium is highly unstable and radioactive, with a very short half-life, making it challenging to study and isolate in significant quantities. Its properties and behavior are still not well-understood due to its extreme instability, but it belongs to the category of superheavy elements and is part of the periodic table's seventh period.

Atomic Weight: (289)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s²7p³
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Livermorium is a synthetic chemical element with the symbol Lv and the atomic number 116. It is an extremely radioactive element that belongs to the p-block of the periodic table and is classified as a transactinide. Livermorium was first synthesized in 2000 by a team of Russian and American scientists at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia.

Atomic Weight: (293)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s²7p⁴
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Tennessine is a synthetic chemical element designated by the symbol Ts and the atomic number 117. Belonging to the p-block and classified as a transactinide, it is extremely radioactive. Discovered in 2010 by the Joint Institute for Nuclear Research in Russia and Oak Ridge National Laboratory in the USA, it was named after the state of Tennessee, in recognition of the region's contributions to transactinide research.

Atomic Weight: (294)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f146d¹⁰7s²7p⁵
Common Oxidation States: N/A
Number of Valence Electrons: N/A

Oganesson is a synthetic, superheavy element carrying the symbol Og and atomic number 118. As a member of the noble gases group in the p-block of the periodic table, it is characterized by its extreme radioactivity. It was first synthesized in 2002 by a collaborative team from the Joint Institute for Nuclear Research in Russia and the Lawrence Livermore National Laboratory in the USA, and it was named in honor of the Russian physicist Yuri Oganessian for his contributions to heavy element research.

Atomic Weight: (294)
Melting Point: N/A
Boiling Point: N/A
Phase at STP: N/A
Electronic Configuration: *[Rn]5f¹⁴6d¹⁰7s²7p⁶
Common Oxidation States: N/A
Number of Valence Electrons: N/A