Crossword puzzle clue "elementary particles with charges of 2 3"

HADRON, one of a class of subatomic particles, including baryons and mesons

MUON, a subatomic particle

NEUTRINO, an uncharged subatomic particle with zero mass when at rest

NEUTRON, a particle in the nucleus of an atom, which is without electrical charge and with approximately the same mass as a proton

ION, an electrically-charged particle formed by loss or gain of electrons by an atom