Bohrium

General properties
Name, symbol, number	bohrium, Bh, 107
Element category	transition metal
Group, period, block	7, 7, d
Standard atomic weight	(270)
Electron configuration	[Rn] 5f14 6d5 7s2 (calculated) 2, 8, 18, 32, 32, 13, 2 (predicted)
History
Discovery	Gesellschaft für Schwerionenforschung (1981)

Bohrium is a chemical element with symbol Bh and atomic number 107, named in honor of 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.

In the periodic table of the elements, it is a d-block transactinide element. It is a member of the 7th period and belongs to the group 7 elements. Chemistry experiments have confirmed that bohrium behaves as the heavier homologue to rhenium in group 7. The chemical properties of bohrium are characterized only partly, but they compare well with the chemistry of the other group 7 elements.

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