“Particle that's either positive or negative” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.ION is the answer to the New York Times crossword clue “Particle that's either positive or negative”. It was last seen in the puzzle of June 30, 2025, where it runs at 63 Down and fills 3 squares. It crosses 3 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.