Write the hyphen notation of the three isotopes of hydrogen

" Isotopes of an element have the same number of protons and electrons but different number of neutrons and different atomic masses. Hydrogen, in particular, has three isotopes: protium or hydrogen-1, deuterium or hydrogen-2 and tritium or hydrogen-3."

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is