Element Seaborgium

Seaborgium ElementIt is named after the American nuclear chemist Glenn T. Seaborg. As a synthetic element, it can be created in a laboratory but is not found in nature.
Seaborgium is a synthetic chemical element with the symbol Sg and atomic number 106.
Seaborgium is expected to be a solid under normal conditions and assume a body-centered cubic crystal structure, similar to its lighter congener tungsten.
It should be a very heavy metal with a density of around 35.0 g/cm3, which would be the fourth-highest of any of the 118 known elements.
This results from seaborgium’s high atomic weight, the lanthanide and actinide contractions, and relativistic effects, although production of enough seaborgium to measure this quantity would be impractical, and the sample would quickly decay.

Names and Identifiers

Chemical Formula:Sg
CAS:34038-81-2
Molecular Weight:271.134 g/mol
EC Number :n/a
MDL Number:n/a
Color:unknown (presumably metallic/ silvery white/ gray)
Other Names:Seaborgio
PubChem CID:56951717
IUPAC Name:Seaborgium
Inchl:InChI=1S/Sg
InChI Key:VAOUCABZIBBBJH-UHFFFAOYSA-N
Canonical SMILES:[Sg]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:35.0 g/cm³
Boiling Point:n/a
Melting Point:n/a
Molecular Formula:Sg
Flash Point:n/a
Exact Mass:269

Seaborgium (106Sg) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was 263mSg in 1974.

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
258Sg258.11320.0029α to 254Rf; SF
259Sg259.11470.9 sα to 255Rf1/2
260Sg260.11440.0036 sα to 256Rf0
261Sg261.11620.23 sα to 257Rf; SF
262Sg262.1164
263Sg263.11822 (13)0.8 sα to 259Rf
264Sg264.11890
265Sg265.121116 sα to 261Rf
266Sg266.121921 sα to 262Rf; SF

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