Class 9 Chemistry Trivia App Download | Atomic and Mass Number Trivia e-Book PDF
Class 9 Chemistry MCQs (Grade 9) From Textbook

Class 9 Chemistry MCQs – Certification Test 69

Atomic and Mass Number Trivia (Question 69) – App & e-Book Download

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MCQ 69: The number of protons in the nucleus constitute it's:

  1. atomic mass
  2. atomic number
  3. nucleon number
  4. number of neutrons

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