## proton

https://doi.org/10.1351/goldbook.P04906
@N04237@ of @C00993@ +1, spin quantum number $$\frac{1}{2}$$ and rest mass of $$1.007\ 276\ 470(12)\ \text{u}$$.
See also:
protium
Source:
Green Book, 2nd ed., p. 93 [Terms] [Book]