Suppose you have 50 grams of a radioactive isotope with a half-life of 2 years. How much of the isotope will you have after 4 years?

A) 50

B) 25

C) 12.5

Question

Karsyn Noble

Chemistry

18 November, 10:19

Suppose you have 50 grams of a radioactive isotope with a half-life of 2 years. How much of the isotope will you have after 4 years?

A) 50

B) 25

C) 12.5

+2

Answers (1)

Know the Answer?

Pooch · Answer 1

A half-life of two years, means that the original amount will decay to half the original amount in two years.

So, if you have 50 grams of a radioactive isotope with a half-life of 2 years, after 2 years it will have 25 grams. But since we are looking for after 4 years, then you divide it by 4. The correct answer is that it will have C. 12.5 grams of isotope after 4 years.

Suppose you have 50 grams of a radioactive isotope with a half-life of 2 years. How much of the isotope will you have after 4 years?A) 50B) 25C) 12.5

Suppose you have 50 grams of a radioactive isotope with a half-life of 2 years. How much of the isotope will you have after 4 years?

A) 50

B) 25

C) 12.5