Class 7 Science Learning App | Atoms and Atom Model MCQs e-Book PDF

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Class 7 Science Competitive Exam MCQs – Practice Test 21 (Chapter 1)

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Atoms and Atom Model MCQs – Practice Test 21 PDF Download

MCQ 101: The smallest atom in 'periodic table' yet found is:

  1. hydrogen
  2. helium
  3. lithium
  4. magnesium

MCQ 102: The number of neutrons in carbon-13 is:

  1. 5
  2. 6
  3. 7
  4. 13

MCQ 103: To multiply multiple elements with a number we use:

  1. comma
  2. dot
  3. brackets
  4. cross

MCQ 104: The ionic chemical formula of magnesium is:

  1. Mg-2
  2. Mg+2
  3. Mg-
  4. Mg+

MCQ 105: Nuclear batteries that produce small amount of current have:

  1. longer life
  2. shorter life
  3. large size
  4. circular shape

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