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Actinium

(Ac)

Category

Actinoid

Series

actinide

Relative atomic mass

227

Density

10.07

Melting point (°C)

1047

Boiling point (°C)

3197

Electronegativity (Pauling)

1.1

Discovery year

1899

Discovered by

Pierre and Marie Curie

created by @lukaswyss

Actinium (Ac) – Element 89