Across
- 3. light or heat
- 5. substances you end with after the chemical reaction
- 6. center of the atoms
- 7. ability to burn or ignite
- 8. make up all the matter in the universe
- 9. two or more atoms bonded together
Down
- 1. cloud outer layers of atoms
- 2. ability to react with other elements
- 4. substances you start with before the chemical reaction
- 5. solid made from 2 liquids