Question

write two isotopes of hydrogen element​

Answer 1

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There are three isotopes of the element hydrogen: hydrogen, deuterium, and tritium. ... Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three. Their nuclear symbols are therefore 1^H, 2^H, and 3^H.

Answer 2

There are three isotopes of the element hydrogen: hydrogen, deuterium, and tritium. How do we distinguish between them? They each have one single proton (Z = 1), but differ in the number of their neutrons. Hydrogen has no neutron, deuterium has one, and tritium has two neutrons.