actinon
Noun
Meaning
any of a series of radioactive elements with atomic numbers 89 through 103
Source: WordNetSynonyms
Hypernyms
Anagrams
Examples
Similarly, 219 Rn is derived from the most stable isotope of actinium ( 227 Ac)—named "actinon"—and is an alpha emitter with a half-life of 3.96 seconds.
In 1923, the International Committee for Chemical Elements and International Union of Pure and Applied Chemistry (IUPAC) chose among the names radon (Rn), thoron (Tn), and actinon (An).