107Bh
Bohrium
Transition MetalBohrium (Bh) is element 107, a transition metal, in period 7 and group 7 of the periodic table. Its atomic mass is usually given as 270. Discovered by GSI, 1981.
Atomic Number107
SymbolBh
NameBohrium
Atomic Weight270 u
CategoryTransition Metal
Period7
Group7
Electron Config[Rn] 5f14 6d5 7s2
Discovered ByGSI, 1981