radon

Definition of Radon in English :

Noun

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

WordNet Lexical Database for English. Princeton University. 2010.

Radon

see synonyms of radon

noun

a colourless radioactive element of the rare gas group, the most stable isotope of which, radon-222, is a decay product of radium. It is used as an alpha particle source in radiotherapy. Symbol: Rn; atomic no: 86; half-life of 222Rn: 3.82 days; valency: 0; density: 9.73 kg/m3; melting pt: –71°C; boiling pt: –61.7°C

Radon

see synonyms of radon

noun

a radioactive, gaseous chemical element, one of the noble gases, formed, together with alpha rays, as a first product in the atomic disintegration of radium: symbol, Rn; at. no., 86

see the periodic table of elements in the Reference Supplement

Radon

see synonyms of radon

n. Symbol Rn

A colorless, radioactive, inert gaseous element that is formed by the radioactive decay of radium and is used to produce neutrons for research. Its most stable isotope is Rn-222 with a half-life of 3.82 days. A natural source of radiation found in most soils and groundwater, radon poses a serious health threat if inhaled. Atomic number 86; melting point -71°C; boiling point -61.7°C; density of gas 9.73 grams per liter; specific gravity (solid) 4. See Periodic Table.

Radon

Noun

Radon

Radon

Radon

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