Across
- 4. A reaction when the products promote the spread of the reaction
- 9. The total amount of protons and neutrons
- 10. A particle with a positive charge
- 12. The amount of time it takes for only half of a sample to decay
- 13. A particle with a negative charge and can be blocked by aluminum
- 14. A particle without a charge
Down
- 1. The amount of protons in the nucleus of an atom
- 2. A particle with a positive charge and is the easiest to block
- 3. Has no charge and large amount of energy
- 5. A reaction when the nuclei of an atom fuse
- 6. A reaction when a nucleus splits
- 7. An atom with a mass different from the one of a periodic table
- 8. The ability of an atom to emit mass and energy
- 11. The center of an atom consisting of protons and neutrons