List three isotopes of hydrogen. State the number of protons and neutrons in each nucleon.

How can I do this?

1H^1, 1H^2, 1H^3.

1H^1 = 1 proton, 0 neutrons
1H^2 = 1 proton, 1 neutron.
You can do the last one?
1H1 is hydrogen.
1H2 is deuterium
1H3 is tritium.