Atomic and Mass Number MCQ App (Android & iOS) – Class 9 Chemistry e-Book PDF

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Class 9 Chemistry MCQs – Certification Test 223

Atomic and Mass Number MCQ (Question 223) – App & e-Book Download

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MCQ 223: The number of protons and neutrons in the nucleus if the atomic number of an element is 17 and the mass number is 35, is:

  1. 17 and 18
  2. 17 and 19
  3. 17 and 20
  4. 17 and 21
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Class 9 Chemistry MCQ App & e-Book – Atomic and Mass Number Certification Guide

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