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Class 7 Science Exam MCQs – Practice Test 20 (Chapter 1)

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Learn Atoms and atom model Notes Questions and Answers PDF for science distance learning programs. Download the Atoms and Atom Model Quiz Answers PDF e-Book, Ch. 1-20 to study Class 7 Science Course. Practice Mass Number and Isotopes MCQ PDF, Atoms and Atom Model Quiz Questions and Answers for science distance learning programs. Download the Atoms and Atom Model Notes App: Free Class 7 Science Study App to mass number and isotopes, atom structure, electrons and shells, ions and bonding test prep for science test preparation systems.

Free Atoms and Atom Model Study App Download: 'Nucleus' is surrounded by; MCQ with answers: protons, electrons, neutrons, and electrons and protons. Practice Mass Number and Isotopes MCQ Questions, download Kobo e-Book (Free Chapter) to achieve academic success online.

Atoms and Atom Model MCQs – Practice Test 20 PDF Download

MCQ 96: Scientists name isotopes by putting:

  1. atomic number after the element name
  2. mass number after the element name
  3. atomic number before the element name
  4. mass number before the element name

MCQ 97: 'Nucleus' is surrounded by:

  1. electrons
  2. protons
  3. neutrons
  4. electrons and protons

MCQ 98: The orbits on which electrons revolve around the nucleus are called:

  1. layers
  2. shells
  3. subshells
  4. atom

MCQ 99: Ion with positive charge is known as:

  1. cation
  2. anion
  3. positron
  4. negatron

MCQ 100: The positive electrical charges of protons are balanced by:

  1. photons
  2. neutrons
  3. electrons
  4. positrons

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