Radioactive elements emit \( \alpha, \beta \) and \( \gamma \)-rays and are characterised by the...

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Radioactive elements emit \( \alpha, \beta \) and \( \gamma \)-rays and are characterised by their half-lives. The radioactive isotope of hydrogen is:
P
(a) Protium
(b) Deuterium
W
(c) Tritium
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