Seaborgium - Sg General Information Discovery Seaborgium was discovered in 1974 by American scientists led by Albert Ghiorso at both Berkeley, California and Livermore National Labs, USA. Appearance Unknown, but probably metallic grey in appearance. Source A transuranium element created by bombarding 249Cf with 18O nuclei. Uses Unknown. Biological Role None. General Information A synthetic element created via nuclear bombardment, few atoms have ever been made and the properties of seaborgium are very poorly understood. It is a radioactive metal and is of research interest only. Interestingly, its chemistry resembles that of tungsten. 249Cf + 18 O ®  263Sg + 4n

	Physical Information
	Atomic Number		106
	Relative Atomic Mass (12C=12.000)		263.12
	Melting Point/K		not available
	Boiling Point/K		not available
	Density/kg m-3		35,000 (estimated)
	Ground State Electron Configuration		[Rn]5f146d47s2
	Electron Affinity(M-M-)/kJ mol-1		not available

	Key Isotopes
	nuclide	259Sg	260Sg	261Sg	263Sg	265Sg
	atomic mass	259.11		261.11	263.11
	natural abundance	0%	0%	0%	0%	0%
	half-life	0.5 secs	4x10-3 secs	0.3 secs	0.9 secs	2.8 secs
	nuclide	266Sg
	atomic mass
	natural abundance	0%
	half-life	27.3 secs

Other Information
Enthalpy of Fusion/kJ mol-1		n/a
Enthalpy of Vaporisation/kJ mol-1		n/a
Oxidation States
SgVI has been predicted as the most stable.
Covalent Bonds /kJ mol-1
not available

	Ionisation Energies/kJ mol-1
	M - M+	730 (est)
	M+ - M2+
	M2+ - M3+
	M3+ - M4+
	M4+ - M5+
	M5+ - M6+
	M6+ - M7+
	M7+ - M8+
	M8+ - M9+
	M9+ - M10+