atomic_number_86 (HyperDic hyper-dictionary)

English > 1 sense of the expression *atomic number 86*:
NOUN	substance	atomic number 86, radon, Rn	a radioactive gaseous element formed by the disintegration of radium

English > *atomic number 86*: 1 sense > noun 1, substance
Meaning	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.
Synonyms	radon, Rn
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
Broader	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
Catalan	número atòmic 86, radó, Rn

HyperDic: atomic_number_86