Across
- 3. - chemical reaction that absorbs thermal energy
- 5. - when one compound breaks down and forms two or more substances
- 7. - one element replaces another element in a compound
- 10. - A process in which atoms of one or more substances rearrange to form one or more new substances
- 11. - a substance that increases reaction rate by lowering the activation energy of a reaction
- 13. - a substance that slows, or even stops a chemical reaction
Down
- 1. - states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction
- 2. - chemical reaction in which two or more substances combine and form one compound
- 4. - a chemical reaction that releases thermal energy
- 6. - when the negative ions in two compounds switch places, forming two new compounds
- 8. - a description of reaction using element symbols and chemical formulas
- 9. energy - the minimum amount of energy needed to start a chemical reaction
- 12. - a chemical reaction in which a substance combines with oxygen and releases energy