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Question

Terrestrial hydrogen contains deuterium mostly in the form of _______.


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Solution

Isotopes

  • Elements with the same atomic number but a different mass number are called isotopes.
  • The isotopes are different because of the different number of neutrons present in them.

Isotopes of hydrogen

  • There are three isotopes of hydrogen; protium(H11), deuterium(H21), and tritium(H31).
  • Terrestrial hydrogen contains 0.0156% of deuterium mainly in the form of HD.

Hence terrestrial hydrogen contains deuterium mostly in the form of HD.


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