atomic number 86

Noun

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

Source: WordNet

Synonyms

radon rn

Hypernyms

element chemical element inert gas noble gas argonon

Close letter words and terms

atomic number 83 atomic number 84 atomic number 85 atomic number 87 atomic number 88 atomic number 89