E.3 Radioactive decay

E.3 Radioactive decay Quiz

IB Physics SL: Quiz

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5 questions, one answer each

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  1. 1. 82214Pb^{214}_{82}\mathrm{Pb} undergoes β⁻ decay. The product is:

    • A. 83214Bi^{214}_{83}\mathrm{Bi}
    • B. 81214Tl^{214}_{81}\mathrm{Tl}
    • C. 80210Hg^{210}_{80}\mathrm{Hg}
    • D. 82213Pb^{213}_{82}\mathrm{Pb}

  2. 2. A sample's activity falls from 640 Bq to 80 Bq in 36 days. Its half-life is:

    • A. 6 days
    • B. 12 days
    • C. 18 days
    • D. 36 days

  3. 3. Which radiation is stopped by a sheet of paper?

    • A. Alpha
    • B. Beta
    • C. Gamma
    • D. Neutrinos

  4. 4. A mass defect of 0.100 u corresponds to a binding energy of about:

    • A. 9.3 MeV
    • B. 93 MeV
    • C. 931.5 MeV
    • D. 0.931 MeV

  5. 5. The count rate from a source is 250 counts per minute with a background of 50 counts per minute. After two half-lives the recorded count rate is:

    • A. 62.5 counts per minute
    • B. 100 counts per minute
    • C. 112.5 counts per minute
    • D. 50 counts per minute

Quiz