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The half-life of plutonium-238 is 87.7 years.

What percentage of the atoms in a sample of plutonium-238 will remain radioactive after 263.1 years?
%



What percentage of the atoms in the same sample of plutonium-238 will have changed to another isotope after 263.1 years?
%

Respuesta :

AashishGiri

Answer:

263.1 is exactly three half-life, so the remaining portion is (1/2 x 1/2 x 1/2) of the original sample. That's 1/8 which is 12.5%

Answer:

12.5 87.5

Explanation:

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