RADIUM

Radium

Radium is a chemical element with symbol Ra and atomic number 88. Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in color. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1601 years and decays into radon gas. Because of such instability, radium is luminescent, glowing a faint blue.

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radium

Noun

  1. a radioactive metallic chemical element (symbol Ra) with an atomic number of 88.


The above text is a snippet from Wiktionary: radium
and as such is available under the Creative Commons Attribution/Share-Alike License.

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