Question

The Environmental Protection Agency has ben concerned about the levels of radon gas in homes. If a sample of gas taken from a basement contains 4.38 g of radon 222, how much radon will remain in the sample after 4 half-lives?

0.28 g

2.19 g

1.10 g

4.38 g

Answer 1

Answer is 2.19 g of radon will remain in the sample after 4 half-lives