radon

Etymology

Contraction of radium emanation, since the element appears in the radioactive decay of radium.

noun

  1. The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
  2. Radon-222 (²²²₈₆Rn), the most stable isotope of this element, .

Attribution / Disclaimer All definitions come directly from Wiktionary using the Wiktextract library. We do not edit or curate the definitions for any words, if you feel the definition listed is incorrect or offensive please suggest modifications directly to the source (wiktionary/radon), any changes made to the source will update on this page periodically.