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Actinium

Actinide
Atomic Mass
227 u
Density
4.39 g/cm³
Melting Point
1,050 °C
Boiling Point
3,200 °C
State
Solid
Discovery
1899

Discovery

Discovered by Friedrich Oskar Giesel in 1899.

Common Uses

  • Used in neutron sources for radiation therapy.
  • Actinium is used in scientific research due to its radioactive properties.

Interesting Facts

  • Actinium was the first radioactive element to be isolated.
  • It glows faintly due to the radiation it emits.
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