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Inorganic Chemicals > Elements > Metals, Heavy > Francium
Inorganic Chemicals > Metals > Metals, Heavy > Francium
Inorganic Chemicals > Elements > Elements, Radioactive > Francium
Inorganic Chemicals > Isotopes > Radioisotopes > Elements, Radioactive > Francium
Inorganic Chemicals > Elements > Metals, Alkali > Francium
Inorganic Chemicals > Metals > Metals, Alkali > Francium

Preferred term

Francium  

Type

  • Topical Descriptor

Broader concept

Scope note

  • A radioactive alkali metal with the atomic symbol Fr, and atomic number 87. The mass numbers of known isotopes are 204-213, 217-224. Its valence is +1.

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URI

http://www.yso.fi/onto/mesh/D005605

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