Across
- 7. least penetrating radioactive emission
- 10. scientist who first showed the atom was made of smaller things
- 12. time required for a quantity to reduce to half of its initial value
- 13. your physics teacher's first name
- 14. radioisotope found in smoke detectors
- 16. the units when you divide the energy in joules by 1.6x10-19
- 18. particle which has a mass of 1 and a charge of +1
- 19. a fundamental particle with a relative mass of 0.0005u
- 20. least penetrating radioactive emission
Down
- 1. most used radioisotope in diagnostic imaging
- 2. name of the constant which links E with f
- 3. the length of a wave
- 4. used to test the integrity of pipeline welds
- 5. when electrons lose energy and fall to lower shells
- 6. if it has an unstable ratio or protons and neutrons
- 8. the effect of a material emitting electrons when exposed to light
- 9. scientist who first showed the nucleus had a concentrated mass and charge
- 11. represented by lambda in decay calculations
- 15. the fundamental particles that make up protons & neutrons
- 17. a fast-moving electron