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About Seaborgium

Seaborgium Bohr

Seaborgium, a transactinide, is the heaviest element that has been studied in aqueous solution. A synthetic element, it was first produced at the Joint Institute for Nuclear Research in the former Soviet Union in June of 1974. In September of that same year, a team at the Lawrence Berkeley National Laboratory also succeeded in producing the element. Despite the Soviet team's priority for this discovery, the element was named after the American chemist Glenn Seaborg, a winner of the 1951 Nobel Prize in Chemistry and the co-discoverer of 10 transuranic elements, as part of a compromise agreement concerning the naming of elements 104 through 108. Seaborg's actinide concept transformed the periodic table, and he served as chairman of the United States Atomic Energy Commission for 10 years. Later in life, he was an ardent supporter of science education and science literacy.

Few atoms of seaborgium have been produced, all isotopes with very short half-lives, making it one of the more challenging elements to study. The element has no practical applications.

Seaborgium Properties

Seaborgium Bohr ModelSeaborgium is a D-Block, Group 6, Period 7 element. The number of electrons in each of Seaborgium's shells is 2, 8, 18, 32, 32, 12, 2 and its electron configuration is [Rn] 7s2 5f14 6d4. In its elemental form, Seaborgium's CAS number is 54038-81-2. Seaborgium's appearance is unknown but it is thought to be silvery, white or metallic gray. Seaborgium is a synthetic element and therefore is not naturally found in the environment. Little is known about the element and it has no known uses. Seaborgium was first created in 1974 at the Lawrence Berkeley National Laboratory and the discovery was later confirmed in 1993 at the same institution.

Seaborgium information, including technical data, properties, and other useful facts are specified below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity, and thermal properties are included.

Symbol: Sg
Atomic Number: 106
Atomic Weight: 269
Element Category: transition metal
Group, Period, Block: 6, 7, d
Color: unknown (presumably metallic/ silvery white/ gray)
Other Names: Seaborgio
Melting Point: N/A
Boiling Point: N/A
Density: 35 (predicted)
Liquid Density @ Melting Point: N/A
Density @ 20°C: N/A
Density of Solid: 23200 (predicted) kg·m3
Specific Heat: N/A
Superconductivity Temperature: N/A
Triple Point: N/A
Critical Point: N/A
Heat of Fusion (kJ·mol-1): N/A
Heat of Vaporization (kJ·mol-1): N/A
Heat of Atomization (kJ·mol-1): N/A
Thermal Conductivity: N/A
Thermal Expansion: N/A
Electrical Resistivity: N/A
Tensile Strength: N/A
Molar Heat Capacity: N/A
Young's Modulus: N/A
Shear Modulus: N/A
Bulk Modulus: N/A
Poisson Ratio: N/A
Mohs Hardness: N/A
Vickers Hardness: N/A
Brinell Hardness: N/A
Speed of Sound: N/A
Pauling Electronegativity: N/A
Sanderson Electronegativity: N/A
Allred Rochow Electronegativity: N/A
Mulliken-Jaffe Electronegativity: N/A
Allen Electronegativity: N/A
Pauling Electropositivity: N/A
Reflectivity (%): N/A
Refractive Index: N/A
Electrons: 106
Protons: 106
Neutrons: 157
Electron Configuration: [Rn] 7s2 5f14 6d4
Atomic Radius: 132 pm (predicted)
Atomic Radius,
non-bonded (Å):
Covalent Radius: 143 pm (predicted)
Covalent Radius (Å): 1.43
Van der Waals Radius: N/A
Oxidation States: 6, 5, 4, 3 (only bolded oxidation states are known experimentally)
Phase: Solid (predicted)
Crystal Structure: N/A
Magnetic Ordering: N/A
Electron Affinity (kJ·mol-1) Unknown
1st Ionization Energy: 757.4 kJ·mol-1 (estimated)
2nd Ionization Energy: 1732.9 kJ·mol-1 (estimated)
3rd Ionization Energy: 2483.5 kJ·mol-1 (estimated)
CAS Number: 34038-81-2
EC Number: N/A
MDL Number: N/A
Beilstein Number: N/A
SMILES Identifier: N/A
InChI Identifier: N/A
InChI Key: N/A
PubChem CID: N/A
ChemSpider ID: N/A
Earth - Total: N/A
Mercury - Total: N/A
Venus - Total: N/A
Earth - Seawater (Oceans), ppb by weight: N/A
Earth - Seawater (Oceans), ppb by atoms: N/A
Earth -  Crust (Crustal Rocks), ppb by weight: N/A
Earth -  Crust (Crustal Rocks), ppb by atoms: N/A
Sun - Total, ppb by weight: N/A
Sun - Total, ppb by atoms: N/A
Stream, ppb by weight: N/A
Stream, ppb by atoms: N/A
Meterorite (Carbonaceous), ppb by weight: N/A
Meterorite (Carbonaceous), ppb by atoms: N/A
Typical Human Body, ppb by weight: N/A
Typical Human Body, ppb by atom: N/A
Universe, ppb by weight: N/A
Universe, ppb by atom: N/A
Discovered By: Lawrence Berkeley National Laboratory
Discovery Date: 1974
First Isolation: N/A

Seaborgium Isotopes

Seaborgium (Sg) is an artificial element. Like all artificial elements, it has no stable isotopes.

Nuclide Isotopic Mass Half-Life Mode of Decay Nuclear Spin Magnetic Moment Binding Energy (MeV) Natural Abundance
(% by atom)
258Sg258.11317(45)#3.3(10) ms [2.9(+13-7) ms]a to 254Rf; SF 0+N/A1862.89-
259Sg259.11450(19)#580(210) ms [0.48(+28-13) s]a to 255Rf1/2+#N/A1870.97-
260Sg260.11442(4)3.8(8) msa to 256Rf0+N/A1879.05-
261Sg261.11612(14)#230(60) msa to 257Rf; SF 7/2+#N/A1887.12-
262Sg262.1164(3)#8(3) ms [6.9(+38-18) ms]SF0+N/A1895.2-
263Sg263.11832(13)#1.0(2) sa to 259Rf9/2+#N/A1903.28-
264Sg264.11893(30)#0.4# sSF0+N/A1911.36-
265Sg265.12111(6)8(3) sa to 261Rf3/2+#N/A1910.12-
266Sg266.12207(31)#21(6) sa to 262Rf; SF 0+N/A1918.2-
267Sg267.12443(29)#19 msSF; a to 263Rf N/AN/A1926.28-
268Sg268.12561(58)#30# sUnknown0+N/A1934.36-
269Sg269.12876(70)#35(23) sa to 265RfN/AN/A1942.44-
270Sg270.13033(66)#10# minUnknown0+N/A1941.2-
271Sg271.13347(70)#2.4(+43-10) mina to 267Rf; SF N/AN/A1949.28-
272Sg272.13516(82)#1# hUnknown0+N/A1957.36-
273Sg273.13822(71)#1# minUnknownN/AN/A1965.44-