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Doctors Medicines MCQs Q&A

  1. 1 and 3 only
  2. 2 and 4 only
  3. 2 and 3 only
  4. 1 and 4 only
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1 Answers

Option 1 : 1 and 3 only

An element's or isotope's atomic number tells how many protons are in its atoms.

An element's or isotope's mass number tells how many protons and neutrons in its atoms.
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