Assertion: hydrogen's proton | /r/HasProperty | the +1 ion of protium
Facets:
Source sentences:
text: Proton, having the symbol p or 1H+, is the +1 ion of protium, 1H. Deuteron, having the symbol 2H+ or D+, is the +1 ion of deuterium, 2H or D. Triton, having the symbol 3H+ or T+, is the +1 ion of tritium, 3H or T.