Across
- 4. a table which tells you many elements
- 7. when heat exists a reaction
- 9. when oxygen is added to the reaction
- 10. something that occurs on a chemical reaction
- 11. the smallest molecule
Down
- 1. an irreversible reaction
- 2. compound is chemically___
- 3. fire needs oxygen fuel and ___
- 5. solid turns into liquid
- 6. water turns into a solid
- 8. multiple types of elements