# Why are "H^+ ion and proton synonymous?

Mar 25, 2017

See explanation

#### Explanation:

By far the most common isotope of hydrogen is ""^1H (a.k.a. protium), which has one electron and a nucleus consisting one proton and no neutrons.

If you make the hydrogren atom into a hydrogen ion by removing an electron, then all you are left with is one proton.

So ""^1H^+ and proton are synonymous.

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Hydrogen has two other isotopes:

• ""^2H, also denoted $D$ and called deuterium.

• ""^3H, also denoted $T$ and called tritium.

The ions of these isotopes include respectively one or two neutrons - not just a proton.