| A | B |
|---|
| an element with an unstable nucleus that is capable of releasing matter and energy | radioactive |
| amount of time it takes half the atoms in a sample of radioactive material to decay | half life |
| the original radioactive element, before nuclear decay | parnet element |
| the new element, product of nuclear decay | daughter element |
| what are scientests able to tell when they compare the amounts of parent and daughter elements | age |
| reaction where the nucleus splits | fission |
| reaction where two small nuclei combine to make one | fusion |
| type of nuclear reaction that happens in stars (our sun) | fusion |
| Describe the chemical reaction on the sun | H into He + energy |
| french scientists who made discoveries in radioactivity | Marie & Pierre Currie |
| disease that can be treated by radioactivity | cancer |
| nuclear weapon that undergoes fission | atom bomb |
| nuclear wepon that undergoes fusion | H (hydrogen) bomb |
