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Radioactivity (A-level only)

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Question 27

Radioactive decay is described as being both random and spontaneous.

Which row in the table correctly describes the meaning of these two terms?

Meaning of random: It is impossible to predict when a particular nucleus will decay. Meaning of spontaneous: The decay is unaffected by external conditions such as temperature or pressure.

Meaning of random: The decay is unaffected by external conditions such as temperature or pressure. Meaning of spontaneous: It is impossible to predict when a particular nucleus will decay.

Meaning of random: The decay constant is the same for all nuclei of a given isotope. Meaning of spontaneous: The rate of decay decreases exponentially with time.

Meaning of random: The rate of decay decreases exponentially with time. Meaning of spontaneous: The decay constant is the same for all nuclei of a given isotope.

Radioactivity (A-level only) Questions

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