thoron

Thor +‎ -on. From thorium, itself from Thor.

thoron (uncountable)

1. (physics) Radon-220 (²²⁰₈₆Rn; symbol Tn), an isotope of radon
2. (organic chemistry) Alternative form of thorin (“C₁₆H₁₁AsN₂O₁₀S₂.₂Na”)

While the chemical symbol "Tn" was at some point assigned to the isotope thoron, said isotope of radon is perhaps better called by the symbol ²²⁰Rn, to make it clear that it is an isotope of radon with said mass number.

• Horton, Rhoton

thoron m (uncountable)

1. thoron (“isotope of radon”)

• “thoron”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.