Berkelium
a transuranic element. symbol: bk; atomic number: 97; atomic weight: 249 (?).
noun
a metallic transuranic element produced by bombardment of americium. symbol: bk; atomic no: 97; half-life of most stable isotope, 247bk: 1400 years; valency: 3 or 4; relative density: 14 (est)
berkelium
(bər-kē’lē-əm, bûrk’lē-əm)
symbol bk
a synthetic, radioactive metallic element of the actinide series that is produced from americium, curium, or plutonium. its most stable isotope has a half-life of about 1,400 years. atomic number 97; melting point 986°c; valence 3, 4. see periodic table.
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