A table in which the chemical elements are arranged in order of increasing atomic number. Elements with similar properties are arranged in the same column (called a group), and elements with the same number of electron shells are arranged in the same row (called a period).
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
Find another word for radon. In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for radon, like: periodic-table, rn and atomic number 86.