PERIODIC TABLE

Actinium

Atomic No. 89 Ac Actinium

About Actinium

As Actinium is a radioactive element without any stable isotopes, Lorad Chemical does not manufacture any compounds that incorporate this element.

Properties

Atomic Number: 89
Atomic Symbol: Ac
Atomic Mass: 227
CAS No.: 7440-34-8
Density: 10.07 g/cm³
Series: actinoid
Melting Point: 1,050°C
Boiling Point: 3,200°C
Thermal Conductivity: 0.12 W/cm °C
Heat of Fusion: 14 kJ/mol
Heat of Vaporization: 400 kJ/mol
Electronegativity: 1.1 pauling
Crystal Structure: Cubic