are you good at science? help me please?

Question

1. compare and contrast 2 types of radioactive decay?

2. do all elemens have half-lives? why or why not

3. explain how radioactive isotopes are used to detect healh problems?

4. supposeyou had two samples of the same radioactive isotope. one sample had a mass of 25g. the otherone had a mass of 50g. would the same number of particles be ejected from each sample in the first hour? explain

Answer 1

1. Just tell similarities and differences between alpha and beta decay.
2. Not if they're not radioactive -- non-radioactive substances don't decay.
3. Technicians give the patient a radioactive form of a substance that will accumulate in the body part they wish to check.
4. No - 25 g doesn't have as many atoms as 50 g. The same percentage will be ejected, but not the same number of particles.