Chapter 2: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 2
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MCQ 71: Each collision of Uranium-238 with neutrons releases
MCQ 72: Carbon is represented by
MCQ 73: One molecule of water is made up of
MCQ 74: Electrons fill energy level starting from the
MCQ 75: The number of neutrons in carbon-14 is
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