Across
- 3. process in which atoms of one or more substances rearrange to form one or more new substances
- 4. number placed in front of an element symbol or chemical formula in an equation
- 8. 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
- 9. minimum amount of energy needed to start a chemical reaction
- 10. starting substance in a chemical reaction
- 11. substance that slows down, or even stops, a chemical reaction
Down
- 1. chemical reactions that absorb thermal energy enzyme catalyst that speeds up chemical reactions in living cells
- 2. starting substance in a chemical reaction
- 3. description of a reaction using element symbols and chemical formulas
- 5. new substance produced by a chemical reaction
- 6. chemical reactions that release thermal energy
- 7. substance that increases the reaction rate by lowering the activation energy of a reaction