Across
- 2. The center of an atom
- 7. A special kind of gas that can conduct electricity
- 8. A very very small particle with nearly no mass
- 9. Giving away heat and or light
- 11. A positively charged particle
- 12. A particle with no charge
- 14. An atom with a different number of neutrons
Down
- 1. When atoms combine to form a new atom
- 3. The movement of a gas or liquid due to a difference in temperature
- 4. A negatively charged particle
- 5. A large cloud of gas and dust in space
- 6. A large hot sphere of gas that creates light
- 7. An electron that has positive charge (!)
- 10. An isotope of Hydrogen
- 13. A unit of temperature