There are three known isotopes of Hydrogen: Hydrogen-1, Hydrogen-2 and Hydrogen-3

Which statements below is/are TRUE about the atoms of the isotopes of Hydrogen? (select all that applies)

All atoms of the three isotopes have exactly one electron.

All atoms of the three isotopes have the same atomic mass.

All atoms of the three isotopes have exactly one proton.

All atoms of the three isotopes have the same number of neutrons.