All chemical elements

Symbol

Bk

Atomic number

97

Chemical property

Actinide

Origin o the name

Berkeley, California, where the element was first synthesized, by analogy with terbium

Period

7

Density (g/cm³)

14.79

Melting point (K)

1259

Boiling point (K)

2900

Electro-negativity

1.3

Abundance in earth's crust (mg/kg)

0