Supposing the half-life of element x to be 1 year, if you have a 100 gram sample of x, how much of element x would be left after

Question

2 years ago

15

4 years? (do not use significant digits in answering this question.)
75 g
50 g
25 g
6.25 g

1 answer:

Vesnalui [34] · Answer 1 · 2023-08-25T00:07:00+03:00

6.25 gram of element x would be left after 4 years.

<h3>What's half life of an element?</h3>

Half - life is the time period of decay of an element to half of its initial number of nuclei.
After n no. of half lives, no. of nuclei left in the sample is initial number of nuclei / 2^n

<h3>What's the amount of 100 gm of element x left after 4 half lives ?</h3>

Leftover amount of the element x = 100/2^4

= 100/16 = 6.25 gram

Thus, we can conclude that 6.25 gram of element x would be left after 4 years.

Learn more about the half life here:

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