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Inorganic Chemicals > Elements > Metals, Heavy > Actinium
Inorganic Chemicals > Metals > Metals, Heavy > Actinium
... > Inorganic Chemicals > Isotopes > Radioisotopes > Elements, Radioactive > Actinoid Series Elements > Actinium
Inorganic Chemicals > Elements > Elements, Radioactive > Actinoid Series Elements > Actinium
Inorganic Chemicals > Metals > Actinoid Series Elements > Actinium

Preferred term

Actinium  

Type

  • Topical Descriptor

Broader concept

Scope note

  • A trivalent radioactive element and the prototypical member of the actinide family. It has the atomic symbol Ac, and atomic number 89. Its principal isotope is 227 and it decays primarily by beta-emission.

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URI

http://www.yso.fi/onto/mesh/D000186

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