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The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively :

Options

  1. A8,10,11
  2. B10,10,10
  3. C10,11,10
  4. D11,10,10

Correct answer

B. 10,10,10

Step-by-step solution

Heavy water is D ₂ O hence number of electrons =2+8=10 number of protons =10 Atomic mass of D ₂ O =4+16=20 hence number of neutron = Atomic mass - number of protons =20-10=10

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