Across
- 1. states that reacting particles must collide with enough energy for a reaction to occur
- 6. reaction involving oxidation and reduction
- 9. number given to an element that shows if it has lost or gained electrons
- 10. a substance that speeds up a chemical reaction without being changed in the process
Down
- 2. is a substance that oxidises another substance and itself reduced
- 3. the sum of oxidation numbers in a compound
- 4. measure of how fast a reaction takes place
- 5. chemical reaction where a substance reacts with oxygen
- 7. is a substance that reduces other substance and itself oxidised
- 8. a change in which a new substance is formed