Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 86: Second shell can hold up to
MCQ 87: The electronic configuration of sodium as K, L, M is
MCQ 88: Hydrogen is a diatomic gas and its chemical formula is
MCQ 89: The second shell with the second energy level is known as
MCQ 90: As the unstable atoms break up into smaller atoms,
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