Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 166: The ion with a negative charge, is known as
MCQ 167: The atomic number of 'oxygen' is
MCQ 168: Protons have
MCQ 169: The maximum number of electrons first shell can hold is
MCQ 170: Little free space is found between particles in
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