Across
- 3. process in which one or more substances are changed into new substances
- 4. chemical reaction in which one substance breaks down into two or more substances
- 6. chemical reaction in which two or more substances combine to form a different substance
- 7. the gain of electrons by the atoms of a substance in a chemical reaction
- 9. chemical reaction that releases some form of energy, such as light or thermal energy
- 11. substance that speeds up a chemical reaction without being permanently changed itself
- 12. in a chemical reaction, the substance that reacts
Down
- 1. chemical reaction that requires energy input in the form of light, thermal energy or electricity in order to proceed
- 2. number in a chemical equation that represents the number of units of each substance taking part in a chemical reaction
- 5. chemical reaction in which energy is primarily given off in the form of thermal energy
- 8. in a chemical reaction, the new substance or substances formed
- 10. chemical reaction that requires thermal energy in order to proceed