# protium

## Noun

1. (chemistry)A type of Hydrogen atoms that they nuclear has only one proton. It can write as ${\displaystyle {\ce {^{1}_{1}H}}}$ or ${\displaystyle {\ce {^{1}H}}}$ or ${\displaystyle {\ce {H}}}$, but not write as P.
2. (chemistry)Substance consisted by protium atoms.