Seaborgium

Koushik 26/06/2026 19:58:09 Updated 26/06/2026 19:58:09

Property	Value
Atomic Number	106
Element	Seaborgium
Symbol	Sg
Atomic Mass	[269] (most stable isotope)
Number of Neutrons	163 (Seaborgium-269)
Number of Protons	106
Number of Electrons	106
Period	7
Group	6
Phase	Solid (predicted)
Radioactive	Yes
Natural	No (synthetic element)
Metal	Yes
Nonmetal	No
Metalloid	No
Type	Transition Metal
Atomic Radius	— (not well established)
Electronegativity	— (not well established)
First Ionization Energy	~7.8 eV (estimated)
Density	~35 g/cm³ (estimated)
Melting Point	— (not well established)
Boiling Point	— (not well established)
Number of Isotopes	No stable isotopes (Sg-269 most notable)
Discoverer	Joint Institute for Nuclear Research (Dubna) and Lawrence Berkeley National Laboratory
Year	1974
Specific Heat	— (not well established)
Number of Shells	7
Number of Valence Electrons	6