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6 Radioactivity

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Question 33

Two deposits of gamma-emitting radioactive material, X and Y, are found in soil after separate incidents. When they are found, each deposit contains the same number of undecayed nuclei. Material X has a half-life of 2 years and material Y has a half-life of 200 years.

Which statement about deposits X and Y, at the time they are found, is correct?

[1]
A

Y has the greater activity; X will remain a radiation hazard for longer.

B

X has the greater activity; Y will remain a radiation hazard for longer.

C

X and Y have the same activity; Y will remain a radiation hazard for longer.

D

X has the greater activity; X will remain a radiation hazard for longer.

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6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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