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30 July, 17:27

Polonium-218 has a half-life of about 3 minutes.

After 15 minutes, how many milligrams of a 120 mg sample will remain?

A. 1.875 mg

B. 3.75 mg

C. 4.8 mg

D. 7.5 mg

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Answers (1)
  1. 30 July, 17:53
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    The answer will be c. 4.8 mg
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