Across
- 1. The original substance
- 6. One element replaces another element in a compound
- 8. The minimum amount of energy to start a chemical reaction
- 11. a chemical reaction that requires heat
Down
- 2. Reaction: A chemical reaction in which heat is released to the surroundings
- 3. Two ionic compounds exchange ions in solution to form two new compounds
- 4. Changes the rate of a chemical rate of a chemical reaction w/o being used up or changed very much
- 5. A compound decomposes into two or more simpler substances
- 7. A substance that slows down or stops a chemical reaction
- 9. Two or more substances combine to form a new compound
- 10. The new substance