bn:00000539n
Noun Concept
Categories: Articles with short description, Actinides, FCC crystal habit, Actinium, Chemical elements
EN
actinium  Ac  atomic number 89  89Ac  element 89
English:
element
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EN
Actinium is a chemical element; it has symbol Ac and atomic number 89. Wikipedia
Symbol Ac, a chemical element Wikipedia Disambiguation
A radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha particle source and in neutron production. OmegaWiki
A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores. Wiktionary
Chemical element. Wiktionary (translation)
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