Chapter 3: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 3
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MCQ 6: "O3" is a chemical formula of
MCQ 7: Ammonia molecule contains one nitrogen atom and three atoms of
MCQ 8: As compare to hydrogen atom, helium atom is
MCQ 9: The major part of an atom is
MCQ 10: Rutherford's Model explains that atom has a nucleus which is surrounded by
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