| A | B |
|---|
| time for half the undecayed nuclei to decay | half life |
| "works against" nuclear fission | electrostatic repulsion of protons |
| results from lose or gain of electrons | an ion |
| alpha particle | equivalent to helium nucleus |
| beta particle | an electron (emitted from nucleus) |
| most penetrating radiation | gamma |
| process of removing electrons from atoms | ionisation |
| radioactive decay | is a random process |
| stopped by few mm of Aluminium | beta radiation |
| minimum mass to ustain a chain reaction | critical mass |
| absorb neutrons to control chain reaction | control rods |
| slows down neutrons,so better chance of reacting with U nuclei | moderator (e.g graphite) |
| removes the thermal energy of the fission reaction | coolant |
| two smaller nuclei join | nuclear fusion |
