Question

Doctors can use radioactive chemicals to treat some forms of cancer. The half life of a certain chemical is 7 days. A patient receives a treatment of 20 millicuries of the chemical.​ (A millicurie is a unit of ​ radioactivity.) How much of the chemical remains in the patient 14 days​ later? The amount remaining after 14 days is ____ millicuries.

Answer 1

Answer:

5 millicuries

Step-by-step explanation:

Half life is 7 days which means it will be at 10 millicuries if we half that again for another 7 days then it will be 5.

Answer 2

The amount remaining after 14 days is 5 millicuries.

How to calculate amount of a substance left after half life -

Given that the half life of a certain chemical is 7 days.

The patient receives a treatment of 20 millicuries of the chemical.

What is half life ?

Half life is defined as the time interval in which the mass of a radioactive substance or the number of its atoms, is reduced to half of its initial value.

Thus after 7 days, the chemical will be reduced to 10 millicuries as its half life is 7 days.

Hence after 14 days, the amount of chemical remaining will be 5 millicuries.

To learn more about half life, refer -

https://brainly.com/question/1160651

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