samanthahK12TVAH samanthahK12TVAH 14-04-2022 Chemistry contestada Literally the last question on the quiz. If you know anything about chem. PLS HELP! If you started with 20.0 g of a radioisotope and waited for 3 half-lives to pass, then how much would remain? 2.50g 5.00g 10.0g 15.0g