Atomic structure and alpha scattering

Atomic structure and alpha scattering Quiz

Spec 111–112 · Edexcel International A Level Physics: Quiz

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5 questions, one answer each

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  1. 1. How many neutrons are in a nucleus of 92238U^{238}_{92}\mathrm{U}?

    • A. 92
    • B. 238
    • C. 146
    • D. 330

  2. 2. Most alpha particles pass undeflected through thin gold foil. This shows that

    • A. the nucleus is negatively charged
    • B. atoms contain mostly empty space
    • C. gold atoms have no electrons
    • D. the nucleus contains neutrons

  3. 3. Which observation showed that the nucleus contains most of the mass of an atom?

    • A. Most alpha particles pass straight through
    • B. Alpha particles are positively charged
    • C. The foil is very thin
    • D. Some alpha particles are scattered back through more than 90°

  4. 4. Two nuclides have the same proton number but different nucleon numbers. They are

    • A. isotopes
    • B. isobars
    • C. ions
    • D. antiparticles

  5. 5. Which discovery led to the replacement of the plum pudding model?

    • A. Large-angle scattering of alpha particles
    • B. The discovery of the electron
    • C. The discovery of the neutron
    • D. Line spectra of hydrogen

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