Class 7 Science MCQs – Certification Test 2

Mass Number and Isotopes MCQs (Question 2) – App & e-Book Download

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MCQ 2: To find out number of neutrons in an atom, we need to know the:

atomic number
proton number
electron number
mass number

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Class 7 Science MCQs App & e-Book – Mass Number and Isotopes Exam Prep

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