51Թ

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actinon

[ak-tuh-non]

noun

Chemistry.

  1. a chemically inert, gaseous, short-lived isotope of radon that is a member of the actinium series. An; 86; 219.

actinon

/ ˈæɪˌɒ /

noun

  1. a radioisotope of radon that is a decay product of radium. Symbol: An or 219 Rn; atomic no: 86; half-life: 3.92s

  2. another name for actinide

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51Թ History and Origins

Origin of actinon1

From New Latin, dating back to 1925–30; actinium, -on 2
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51Թ History and Origins

Origin of actinon1

C20: New Latin, from actinium + -on

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