Across
- 3. A chemical ___ is an expression that uses symbols to show the relationship between the starting substances and the substances that are produced by a chemical reaction.
- 4. The substances formed in a chemical reaction.
- 8. A substance that changes the rate of a chemical reaction without being used up or changed very much.
- 9. A chemical reaction that gives off energy.
- 10. A number placed in front of a chemical formula.
Down
- 1. A chemical ___ uses chemical symbols and numbers to represent a given substance
- 2. A chemical reaction that requires energy to be taken in.
- 5. A chemical ___ is the process in which atoms are rearranged to produce new substances.
- 6. The numbers written below and to the right of chemical symbols are called this.
- 7. The substances that participate in a chemical reaction.