Ac

ACTINIUM

Definition :from 'aktinos' or ray. second rarest of all the elements.it has a half life of 22 years and decomposes into francium and helium

Discovery :1899 by andre loius debieme of france

Uses :neutron production, source of alpha rays

Group of Elements :Actinides(Solid)

Atomic Weight :(227)

Oxidation State :+3

Melting Point :1050

Boiling Point :3200

Electronegativity :1.1