Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 6: Sodium ion has
MCQ 7: Radioactive particles give off
MCQ 8: The formula that shows the number and kind of atoms which a substance of a molecule contained, is known as
MCQ 9: Sodium becomes a cation when
MCQ 10: The symbol of potassium is
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