Stable and unstable nuclei

Stable and unstable nuclei Quiz

Spec 3.2.1.2 · AQA A-Level Physics: Quiz

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  1. 1. Which describes the strong nuclear force between two nucleons 1.5 fm apart?

    • A. Repulsive
    • B. Zero
    • C. Attractive
    • D. Purely electrostatic

  2. 2. Radon-222 (86222Rn^{222}_{86}\mathrm{Rn}) decays by alpha emission. Which nucleus is formed?

    • A. 84218Po^{218}_{84}\mathrm{Po}
    • B. 87222Fr^{222}_{87}\mathrm{Fr}
    • C. 86218Rn^{218}_{86}\mathrm{Rn}
    • D. 88226Ra^{226}_{88}\mathrm{Ra}

  3. 3. What happens to a nucleus in beta-minus decay?

    • A. Z falls by 1 and A is unchanged
    • B. Z rises by 1 and A is unchanged
    • C. Z rises by 1 and A rises by 1
    • D. Z falls by 2 and A falls by 4

  4. 4. Why was the neutrino hypothesised?

    • A. To explain why beta particles are charged
    • B. To explain why alpha particles have a short range
    • C. To explain why protons repel each other
    • D. To account for the energy missing in beta decay

  5. 5. Where does the electron emitted in beta-minus decay come from?

    • A. An orbital electron being ejected
    • B. A proton changing into a neutron
    • C. A neutron changing into a proton
    • D. A gamma-ray photon

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