Question

How many half-lives have passed if a sample contains 25% of its original carbon-14?
1 half-life
2 half-lives
3 half-lives
4 half-lives

Answer 1

Answer: 2 half lives

Answer 2

2 half-lives have passed if a sample contains 25% of its original carbon-14.option B is correct.

What is radioactivity?

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

The half life is found as;

$\rm N=\frac{N_0}{2^n}$

Archaeologists use radioactive decay of an isotope of the element carbon. Because it has a fairly short half-life, and is found in anything that was once living.

2 half-lives have passed if a sample contains 25% of its original carbon-14.

Hence,option B is correct.

To learn more about the radioactivity, refer  to the link;

brainly.com/question/1770619

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