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Chemistry

9th -

12thgrade

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Atomic Number, Mass Number and Isotopes

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32 questions

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  • 1. Multiple Choice
    1 minute
    1 pt
    What is the atomic number?
    the number of protons
    the number of protons and neutrons
    the number of neutrons
    the number of protons and electrons
  • 2. Multiple Choice
    1 minute
    1 pt
    What is the mass number defined as?
    the number of protons
    the number of protons and neutrons
    the number of neutrons
    the number of protons and electrons
  • 3. Multiple Choice
    1 minute
    1 pt
    Image
    What is the atomic number of this atom?
    1
    3
    4
    7
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