My Saved Article
|Atomic Number:||97||Atomic Symbol:||Bk|
|Atomic Weight:||247||Electron Configuration:||2-8-18-32-27-8-2|
|Melting Point:||oC||Boiling Point:||oC|
|Description:||Man made radioactive metal.|
- (Berkeley, home of the University of California) Berkelium, the eighth
member of the actinide transition series, was discovered in December 1949 by
Thompson, Ghiorso, and Seaborg, and was the fifth transuranium element
- It was produced by cyclotron bombardment of miligram amounts of 241Am with
helium ions at Berkeley, California.
- The first isotope produced had a mass of 243 and decayed with a half-life of
- Ten isotopes are now known and have been synthesized.
- The evidence of 249Bk with a half-life of 314 days, makes it feasible to
isolate berkelium in weighable amounts so taht its properties can be
investigated with macroscopic quantities.
- One of the first visible amounts of a pur berkelium compound, berkelium
chloride, was produced in 1962.
- It weighed 1 billionth of a gram. Berkelium probably has not yet been
prepared in elemental form, but is expected to be a silvery metal, easily
soluble in dilute mineral acids, and readily oxidized by air or oxygen at
elevated temperatures to form the oxide.
- X-ray diffraction methods have been used to identify various compounds.
- As with other actinide elements, berkelium tends to accumulate in the
- Because of its rarity, berkelium presently has NO COMMERCIAL OR