Definitions
Atom variant with the same element but different neutron count.
Word origin
From iso- (“equal”) + -tope (“place”), because the different isotopes of an element always occupy the same place in the periodic table. The term was coined by Scottish doctor Margaret Todd in 1909 and first used publicly on February 27, 1913 by English chemist Frederick Soddy.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Atomic variant”7 letters
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