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The number of isotopes of hydrogen are

$\begin{array}{1 1}(a)\;2\\(b)\;1\\(c)\;4\\(d)\;3\end{array}$

1 Answer

Hydrogen has 3 isotopes
There are three isotopes of the element hydrogen: hydrogen, deuterium, and tritium.
Hence (d) is the correct answer.
answered Jan 22, 2014 by sreemathi.v
edited Nov 23, 2017 by sharmaaparna1