Crossword clues for the word: PROTONS The word PROTONS has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for PROTONS Showing 1 to 9 of 9 results Clue(s) Components of atoms Helium pair Octet in an oxygen atom Particles composed of two up quarks and one down quark Parts of atoms. Positive particles Positively charged particles Positively charged subatomic particles Stable particles