Aradioisotope has a half-life of 4 days how much of a 20 gram sample of this radioisotope remains at the end of each time period

After 4 days 10 g will left

After 8 days 5 g will left.

Explanation:

Given data:

Half life of isotope = 4 days

Total amount of sample = 20 g

Amount left after each time period = ?

Solution:

The half life of radioactive isotope is 4 days it means after 4 days the amount left will be half of total amount.

20 g/2 = 10 g

The half amount which is left will be consume in next 4 days and remaining amount will be,

10 g/2 = 5 g

After 4 days 10 g will left

After 8 days 5 g will left.

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