Across
- 3. a radiation particle made of high-speed electrons
- 6. when an atom gains so much energy it loses an electron and becomes an ion
- 9. a positively charged sub-atomic particle with a mass of 1 found in the nucleus
- 10. a negatively charged sub-atomic particle with a mass of 1/1835 found in shells
- 11. a type of gas known for being a source of background radiation
- 13. energy emitted from an atom
- 14. when an unstable nucleus breaks down
Down
- 1. the length of time it takes for half of a radioactive sample to break down
- 2. what happens when radiation causes damage to the DNA inside a cell
- 4. a radiation particle made of two protons and two neutrons
- 5. an atom of the same element with a different atomic mass
- 7. an uncharged sub-atomic particle with a mass of 1 found in the nucleus
- 8. any sub-atomic particle found in the nucleus
- 9. a radiation particle made of high-speed positively charged particles
- 12. a type of radiation that is a high frequency wave