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Abundance and Isotopes

Hydrogen has ...

Question

Hydrogen has ____ naturally occurring isotopes.

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Solution

Hydrogen have 3 naturally occurring isotopes viz. Protium ( $_{1}^{1} H$ ), Deuterium ( $_{1}^{2} H$ ) and Tritium ( $_{1}^{3} H$ ).
Hence, the correct answer is $3$

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