Class 7 Science Study App | Atoms and Atom Model Quiz e-Book PDF

Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science MCQs – Practice Test 23 (Chapter 1)

Atoms and Atom Model Quiz with Answers PDF Download – Test 23

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Learn Atoms and atom model Quiz Questions and Answers PDF (Atoms and Atom Model Quiz PDF e-Book) download Ch. 1-23 to learn Class 7 Science Course. Solve Mass Number and Isotopes MCQs PDF, Atoms and Atom Model Quiz Questions and Answers to gain science skills. Free Class 7 Science Study App: Download the Atoms and Atom Model Quiz App to learn mass number and isotopes, chemical formulas, atoms and elements, ionic bonds, electron levels test prep for science online resource hubs.

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Atoms and Atom Model Quiz – Practice Test 23 PDF Download

MCQ 111: The 'isotope' carbon-12 makes up about:

  1. 90% of carbon on earth
  2. 80% of carbon on earth
  3. 99% of carbon on earth
  4. 89% of carbon on earth

MCQ 112: One molecule of carbon dioxide consists of:

  1. one carbon and two oxygen atoms
  2. one carbon and oxygen atom
  3. two carbon and one oxygen atom
  4. two carbon and one oxygen atoms

MCQ 113: Atoms of different elements differ from each other because of:

  1. difference in color
  2. difference in size
  3. difference in shape
  4. difference in particle numbers

MCQ 114: When salt is formed, sodium:

  1. gives an electron to chlorine
  2. takes an electron from chlorine
  3. shares an electron with chlorine
  4. takes a proton from chlorine

MCQ 115: In an atom of carbon, electronic configuration is:

  1. 2 electrons in K shell and 4 in M shell
  2. 2 electrons in L shell and 4 in M shell
  3. 2 electrons in K shell and 4 in L shell
  4. 4 electrons in K shell and 2 in L shell

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