NO. 097Actinide

Bk

Berkelium

Berkelium is a synthetic radioactive element used primarily in scientific research and in the synthesis of heavier elements.

Crystal Structure

double hexagonal close-packed

Atomic Mass247 u

Density14.8 g/cm³

Melting Point1259 K

Boiling Point2900 K

Atomic Radius170 pm

Electronegativity1.3

Ionization Energy601 kJ/mol

Electron Affinity0 kJ/mol

Bonding TypeMetallic

Oxidation States3, 4

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Rn] 5f9 7s2

Discovered ByLawrence Berkeley Lab

Year1949

Known Isotopes

Bk-247