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Question:

The isotopes of hydrogen are: Protium, deuterium and tritium

Protium and deuterum only

Protium, deuterium and tritium

Tritium and protium only

Deuterium and tritium only

Solution:

Hydrogen has three naturally occurring isotopes: 1H (protium), 2H (deuterium), and 3H (tritium). These isotopes form naturally in nature. Protium and deuterium are stable. Tritium is radioactive and has a half-life of about 12 years. Hence, option B is correct.