Actinium

Related Terms:

actinoid protactinium actinon actinism actino uranium transactinide element actinate actiniums actiniferous atomic number radioactinium radioactive ac mesothorium metallic scandium group ore chemical eka actinium

Definitions:

Noun

actinium Ac atomic number 89

Definition: a radioactive element of the actinide series; found in uranium ores

Definition: a radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores

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