1.) A radioisotope has a half-life of 4 days. How much of a 20 gram sample of this radioisotope remains at the end of each time period? a.) 4 days b.) 8 days​

1 A radioisotope has a halflife of 4 days How much of a 20 gram sample of this radioisotope remains at the end of each time period a 4 days b 8 days class=