Bohrium (Bh)

From Wikipedia, the free encyclopediaBohrium is a chemical element with symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 270Bh, has a half-life of approximately 61 seconds.

Bohrium in the periodic table

SymbolBh
Atomic number107
Group7
Period7
Blockd
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density37.1 g/cm3
Atomic weight270 u
Melting point K
°C
°F
Boiling point K
°C
°F

Atomära egenskaper

Electronegativity (Pauling Scale)
Electron affinity kJ/mol
Ionization energies
1 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d5 7s2
Electrons per shell2, 8, 18, 32, 32, 13, 2

History

Discovered1981
Discovered byGesellschaft für Schwerionenforschung