ELEMENT: BOHRIUM

BOHRIUM
Proposed Name
(Formally known as Ns - Nielsbohrium)

Atomic Number:	107
Atomic Symbol:	Bh
Atomic Weight:	274
Electron Configuration:	[Rn]7s²5f¹⁴6d⁵
Total Isotopes	18
Total Isomers	2
Radioactive Isotopes	16
Stable Isotopes	0

View Nuclear Periodic Table
View Isotopic & Isomeric Data

History

In 1976 Soviet scientists at Dubna announced they had synthesized element 107 by bombarding 204Bi with heavy nuclei of 54Cr. Reports say that experiments in 1975 had allowed scientists "to glimpse" the new element for 2/1000 s. A rapidly rotating cylinder, coated with a thin layer of bismuth metal, was used as a target. This was bombarded by a stream of 54Cr ions fired tangentially.

The existence of element 107 was confirmed by a team of West German physicists at the Heavy Ion Research Laboratory at Darmstadt, who created and identified six nuclei of element 107.

Sources: Los Alamos National Laboratory; CRC Handbook of Chemistry and Physics; American Chemical Society


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