Bohrium

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

Property	Value
Atomic Number	107
Element	Bohrium
Symbol	Bh
Atomic Mass	[270] (most stable isotope)
Number of Neutrons	163 (Bohrium-270)
Number of Protons	107
Number of Electrons	107
Period	7
Group	7
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	~7.7 eV (estimated)
Density	~37 g/cm³ (estimated)
Melting Point	— (not well established)
Boiling Point	— (not well established)
Number of Isotopes	No stable isotopes (Bh-270 most notable)
Discoverer	Gesellschaft für Schwerionenforschung (GSI), Germany
Year	1981
Specific Heat	— (not well established)
Number of Shells	7
Number of Valence Electrons	7