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Lawrencium-262 has a half-life of 4 hr. How much of a 40 mg sample remains after 12 hours?
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Lawrencium-262 has a half-life of 4 hr. How much of a 40 mg sample remains after 12 hours?

User Nathan Hornby
by
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1 Answer

2 votes

Answer:

5 mg

Step-by-step explanation:

If one half life is 4 hours, then 3 half lives is 12 hours.

This means that the sample will decay to 1/8 of its original amount.

So, the answer is 40(1/8) = 5 mg.

User Xjcl
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