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

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

jim_thompson5910 · Answer

"a half-life of 2 years" means that after 2 years, the original amount will decay to half the original amount

ex: if you have 100 grams, then after 2 years, it will decay to 50 grams

anonymous · Answer

thank you for explaining that to me :) now i actually understand the question!

jim_thompson5910 · Answer

you're welcome, I'm glad it's making sense now