Answer: ISOTONE
ISOTONE is a crossword puzzle answer that we have spotted 3 times.
Referring Clues:
- One of a related set of atoms
- One of a group of atoms having the same number of neutrons but a different number of protons
- One of two nuclides with the same neutron number but different proton numbers
Last Seen In:
- LA Times - November 12, 2016
- New York Times - March 27, 2015
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