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6 questions
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  • Q1
    Which two subatomic particles are present in the nucleus of an atom?
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    30s
  • Q2
    The relative mass of a neutron is ...
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    30s
  • Q3
    What is the mass number of an atom?
    number of protons
    number of electrons
    number of neutrons
    total number of protons and neutrons
    total number of protons and electrons
    30s
  • Q4
    Order the method for working out the number of the three subatomic particles in an atom of sodium. Start with the number of protons, then work out the number of electrons, then finally neutrons.
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    30s
  • Q5
    Match the atoms with the number of neutrons in their nucleus. Use your periodic table to help.
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    30s
  • Q6
    Chlorine atoms mainly exist as ³⁵Cl and ³⁷Cl. Why are the mass numbers different?
    ³⁵Cl has 18 neutrons and ³⁷Cl has 20 neutrons.
    ³⁵Cl has 18 protons and ³⁷Cl has 20 protons.
    ³⁵Cl has 18 neutrons and ³⁷Cl has 20 protons.
    ³⁷Cl has gained two electrons to get a full outer shell.
    This is a mistake as they should all be the same.
    30s

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