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单词 thoron
释义

WordReference Random House Unabridged Dictionary of American English © 2024
tho•ron  (thôr′on, thōr′-),USA pronunciation n. [Chem.]
  1. Chemistrya radioactive isotope of radon, produced by the disintegration of thorium. Symbol: Tn;
    at. wt.: 220;
    at. no.: 86.
  • thor(ium) + -on2 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
thoron /ˈθɔːrɒn/ n
  1. a radioisotope of radon that is a decay product of thorium. Symbol: Tn or 220Rn; atomic no: 86; half-life: 54.5s
Etymology: 20th Century: from thorium + -on
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