Asked by Sigma

Americium-241 is a radioactive substance used in smoke detectors. The half life of americium is 432 years. If a smoke detector initially contains 1 gram of Americium 241, how much will remain in 1,296 years?(1 point)
Responses

0.125 g
0.125 g

0.25 g
0.25 g

1.0 g
1.0 g

0.5 g

All Answers 1

Answered by GPT-5 mini AI
Half-life formula: A = A0*(1/2)^(t/T). Here t = 1296, T = 432, so t/T = 3. A = 1*(1/2)^3 = 1/8 = 0.125 g.