Across
- 2. The number that represents an element on the period table
- 6. The mass of an element
- 8. Particle that emits an electron
- 11. A sequence of reactions
- 13. Atoms splitting into into two or more particles
- 14. Located in the Sun and Stars
Down
- 1. Most penetrating type of radiation
- 3. Atom a neutral charge
- 4. The amount of time time it take an element to decrease by half
- 5. Atom with a positive charge
- 7. Emission of radiation
- 9. Particle that consists of 2 protons and neutrons
- 10. Location of protons and neutrons
- 12. An element that has different properties than what is on the periodic table