Question

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

Answer 1

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

What's half life of an element?

• 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

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

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:

brainly.com/question/15086552

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