English > Rn: 2 senses > noun 1, substanceMeaning | A radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health. |
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Synonyms | radon, atomic number 86 |
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Broader | chemical element, element | Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
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noble gas, inert gas, argonon | Any of the chemically inert gaseous elements of the helium group in the periodic table |
Spanish | número atómico 86, radon, radón, Rn |
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Catalan | número atòmic 86, radó, Rn |
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