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. Radio-isotopes of di erent elements have di erent half-lives. Magnesium-27 has a half-life of9:45 minutes. What percentage of a given initial amount of magnesium-27 will remain afteran hour?(Round your answer to two decimal places.

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Answer:

16.25% after an hour...

Explanation:

Half life of Magnesium-27 = 9:45 minutes = 585 seconds

As 1 hour = 3600 s So,

Concentration after an hour = (585 / 3600) x 100 = 16.25%

Explanation:

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