The term actinium is defined as a radioactive metallic element that is silver-white but glows blue in the dark. It is of the actinide series, found in uranium ores and is about 150 times more radioactive than radium. Actinium can also be referred to as atomic number 89 and resembles the rare earths in chemical behaviour as well as valence.
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what is the definition of actinium
a radioactive silver-white metallic element that glows blue in the dark, resembling the rare earths in chemical behavior and valence. Symbol: Ac; atomic number: 89; atomic weight: 227.
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