Ncert Exercises & Solutions

Radioactive elements emit $α$ , $β$ , and $γ$ rays and are characterized by their half-lives. The radioactive isotope of hydrogen is

1. Protium

2. Deuterium

3. Tritium

4. Hydronium

Hint: Isotope having an atomic mass of 3 is radioactive.

The radioactive isotope of hydrogen in tritium. For tritium (n=3, p=1), therefore n/p ratio is 3.

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