The Nuclear Model of the Atom (Cambridge O Level Physics)

Exam Questions

2 hours30 questions
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Hydrogen is an element with one proton. It has three different isotopes.  


Which statement about the three Hydrogen isotopes is correct?

  • They must have different numbers of electrons orbiting their nucleus.

  • They must all have one proton in their nuclei.

  • They must all have one neutron in their nuclei.

  • They must all have the same number of nucleons in their nucleus.

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The nuclide notation for a generic element is given below:

      bold X presubscript straight Z presuperscript straight A   

Which of the following is the correct definition of each of the terms?

 

X

A

Z

A

symbol

nucleon number

proton number

B

symbol

proton number

nucleon number

C

symbol

neutron number

proton number

D

nucleon number

proton number

neutron number

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    An atom consists of electrons orbiting a nucleus. The nucleus contains protons and neutrons.

    For the atom to be neutral, which statement about the atom must be correct?

    • The number of electrons is equal to the number of protons.

    • The number of protons is equal to the number of neutrons.

    • The number of electrons, protons and neutrons are all different.

    • The number of electrons is equal to the number of neutrons.

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    The charge on an electron is -e.

    Which answer below correctly describes the charge of a proton and the charge on a neutron?

     

    Proton

    Neutron

    A

    0

    +e

    B

    +e

    -e

    C

    +e

    0

    D

    -e

    +e

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      Uranium is represented as:

      space bold U presubscript 92 presuperscript 235

      Which of the answers below could be an isotope of Uranium?

      • straight U presubscript 91 presuperscript 235

      • begin mathsize 24px style straight U presubscript 92 presuperscript 238 end style

      • begin mathsize 24px style straight U presubscript 235 presuperscript 92 end style

      • begin mathsize 24px style straight U presubscript 90 presuperscript 235 end style

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      An atom of Helium has the following nuclide symbol:

      bold He presubscript 2 presuperscript 4

      Which of the following diagrams best represents a neutral atom of Helium?

      q1-medium-mcq-5-1-the-nuclear-modelof-atom-cie-igcse-physics

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        How many neutrons are in a nucleus of Aluminium? The chemical symbol is given below:

        CijCCrn0_q2-medium-mcq-5-1-the-nuclear-modelof-atom-cie-igcse-physics

        • 13

        • 27

        • 14

        • 40

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        Below are the symbols for four different nuclides.

        q3-medium-mcq-5-1-the-nuclear-modelof-atom-cie-igcse-physics

        Which two nuclides are isotopes of the same element?

        • Nuclide 1 and nuclide 4.

        • Nuclide 1, nuclide 3 and nuclide 4

        • Nuclide 2 and nuclide 3

        • Nuclide 2 and nuclide 4

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        A nitrogen atom loses an electron. 

        What is it called now?

        • An atom

        • An isotope

        • A negative ion

        • A positive ion

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        How many neutrons are in one neutral atom of the krypton isotope Kr presubscript 36 presuperscript 84?

        • 36

        • 48

        • 84

        • 120

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        straight C presubscript 6 presuperscript 14 represents a nuclide of the element carbon and straight N presubscript 7 presuperscript 14represents a nuclide of the element nitrogen.

        How is a neutral atom of straight N presubscript 7 presuperscript 14 different to a neutral atom of straight C presubscript 6 presuperscript 14?

        • The nitrogen atom has one electron fewer than the carbon atom.

        • The nitrogen atom has one neutron more than the carbon atom.

        • The nitrogen atom has one proton fewer than the carbon atom.

        • The nitrogen atom has one proton more than the carbon atom.

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        Nuclear reactions can release huge amounts of energy.

        Which nuclear reaction takes place in the sun and which nuclear reaction takes place in a nuclear power station?

         

        The Sun

        A nuclear power station

        A

        fusion

        fusion

        B

        fusion

        fission

        C

        fission

        fission

        D

        fission

        fusion

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          In 1911 Rutherford performed an experiment that provided evidence for the nuclear atom.

          Which of the diagrams below best represents this experiment?

          AqGz6M08_q2-hard-mcq-5-1-the-nuclear-modelof-atom-cie-igcse-physics

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            Fusion is a type of nuclear reaction.

            Which term below is a correct statement about nuclear fusion?

            • It occurs in nuclear power stations.

            • It involves a larger nucleus decaying into two (or more) smaller nuclides.

            • Uranium is a type of fuel for nuclear fusion.

            • Light nuclei (such as hydrogen and helium) fuse together, releasing energy in the process.

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            In Rutherford's experiment, α-particles were fired at a thin metal foil. This is shown in the image below.

            q5-hard-mcq-5-1-the-nuclear-modelof-atom-cie-igcse-physics

            Why are α-particles used rather than neutrons?

            • They are positively charged, which causes them to repel when they pass close to a nucleus.

            • They are very small in diameter, and so are less likely to interact with a nucleus.

            • They travel more slowly.

            • They are heavier.

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