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:

17 and 18
17 and 19
17 and 20
17 and 21

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