Actinium

Element information

Atomic properties

Mass: 227.02775 u

Electron configuration: [Rn]7s2 6d1

Oxidation states: +3

Electronegativity: 1.1

Physical properties

Density: 10.07 g/cm³

Standard state: solid

Melting point: 1324 K

Boiling point: 3471 K

₈₉Ac

Part of the Periodic Table 2 collection

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