Why deutrium is called a heavy hydrogen and why tritium is not a heavy

1.	Why deutrium is called a heavy hydrogen and why tritium is not a heavy hydrohen
Answer» Hydrogen has three isotopes which are protium, deuterium and tritium. Deuterium is therefore one of the isotopes of hydrogen. It has one proton and one neutron. The most common isotope of hydrogen is protium which has one proton and no neutrons. Because deuterium contains a neutron, it is heavier than protium, so it is sometimes called as heavy hydrogen.....i hope u liked the answer ....plzzzz give me a thumps up....... :))))

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