anglais

radon

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(Anglais)

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

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40k
Prononcé comme (IPA)
/ˈɹeɪdɒn/
Étymologie (Anglais)

Contraction of radium emanation, since the element appears in the radioactive decay of radium. By surface analysis, radio- + -on (“suffix for noble gases”).

Améliorez votre prononciation

Rn

niton

atomic number 86

radium emanation

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