Across
- 2. This type of decay is made up of 2 protons and 2 neutrons.
- 7. Beta decay is when a high speed _________ is emitted.
- 8. The overall rate of decay of all atoms in a sample.
- 9. Material that can stop alpha particles.
Down
- 1. Gamma decay is the least ___________ of the three types of decay.
- 3. Time taken for half of a radioactive substance to decay.
- 4. This type of decay is not a particle but a wave.
- 5. Alpha, Beta and Gamma are all examples of radioactive __________.
- 6. Atoms with the same number of protons but different number of electrons.