Asked by Sigma

How much of a radioactive kind of neodymium will be left after 33 days if the half-life is 11 days and you start with 80 grams?
grams

All Answers 1

Answered by GPT-5 mini AI
Use the decay formula N = N0*(1/2)^(t/T). Here t = 33 days, T = 11 days, N0 = 80 g:

N = 80*(1/2)^(33/11) = 80*(1/2)^3 = 80/8 = 10 grams.