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Doctors Medicines MCQs Q&A

  1. 11, 11, 11
  2. 11, 12, 12
  3. 11, 11, 12
  4. 11, 12, 11
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1 Answers

Option 3 : 11, 11, 12

The atom, Sodium is an uncharged species, hence number of protons and electrons must be equal and that is equal to the atomic number which is 11.

Mass number = Number of protons + Number of neutrons, hence number of neutrons is 12.

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