MCQ
How many neutrons are present in the nucleus hydrogen atom?
- A$1$
- B$2$
- C$3$
- ✓$0$
Hydrogen exists as three different isotopes. $\mathrm{H}_{-1}, \mathrm{H}_{-2}$, and $\mathrm{H}_{-3} . \mathrm{H}_{-1}$ is hydrogen with a proton in the nucleus and exists in nature as $\mathrm{H}_2$.
This is the most common form of hydrogen. $\mathrm{H}_{-2}$, also known as deuterium, has one proton and one neutron in its nucleus.
$\mathrm{H}_{-3}$, also known as tritium, has one proton and two neutrons in its neucleus. Tritium is a radioactive isotope.
So while the most common form of hydrogen has no neutrons in its neucleus, other isotopes do.
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