Across
- 1. Matter can't be neither created nor destroyed in a chemical reaction
- 7. Numbertelling how many molecules of a substance are involved in a chemical reaction
- 9. One or two letters used to represent an element
- 10. Appearance of a solid when two liquids mix
- 11. A change in matter that produces new substances
Down
- 2. Reactions give off energy/heat
- 3. Substances present before a reaction
- 4. Reactions absorb energy/heat
- 5. Substances present after a reaction
- 6. Uses symbols and formulas to show reactions
- 8. Numbers telling how many atoms are in a molecule or the ratio of elements in a compound