hydron
cationic form of atomic hydrogen (symbol H⁺), informally called "proton"
protonsubatomic particle with positive charge
tritonatomic nucleus; having the symbol ³H⁺ or T⁺, is the +1 ion of tritium, ³H or T
deuteronatomic nucleus; having the symbol ²H⁺ or D⁺, is the +1 ion of deuterium, ²H or D