The radioactive isotope Ra-226 has a half-life of about 1600

Last updated: 7/27/2022

The radioactive isotope Ra-226 has a half-life of about 1600 years. If 10 grams is present now, how much will be left 500 years from now? Round to the nearest thousandth of a gram. a) 8.912 grams b) 8.052 grams c) 7.839 grams d) 7.496 grams