Atoms and Atom Model Study App | Class 7 Science Quiz e-Book PDF
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Class 7 Science MCQs – Practice Test 23 (Chapter 1)

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Study Atoms and atom model Quiz Questions and Answers PDF for science online resource hubs. Download the Atoms and Atom Model Quiz PDF e-Book, 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. Download the Atoms and Atom Model Learning App: Free Class 7 Science Quiz App to learn mass number and isotopes, chemical formulas, atoms and elements, ionic bonds, electron levels test prep for science online resource hubs.

Free Atoms and Atom Model Quiz App Download (Android & iOS): One molecule of carbon dioxide consists of; MCQ with answers: one carbon and oxygen atom, one carbon and two oxygen atoms, two carbon and one oxygen atom, and two carbon and one oxygen atoms. Learn Mass Number and Isotopes MCQ Questions, download Google Book (Free Chapter) to learn environmental science.

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

Atoms and Atom Model Quiz App & e-Book – Class 7 Science Study Material

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