A radioactive substance with a half-life of 3.0 days has an initial activity of 2400 Bq. What is its activity after 6.0 days?

Name: A radioactive substance with a half-life of 3.0 days has an initial activity of 2400 Bq. What is its activity after 6.0 days?
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Question

Quizplus · Accepted Answer

The activity of a radioactive substance decreases by half every half-life. After 6.0 days, which is two half-lives (3.0 days each), the activity will be reduced to one-fourth of the initial activity: 2400 Bq / 4 = 600 Bq.

A Radioactive Substance with a Half-Life of 3