Across
- 4. a change that can not be undone or reversed
- 7. toxic gas formed during incomplete combustion
- 8. what you are starting with at the beginning of your reaction
- 9. the smallest particle of an element
Down
- 1. change in which atoms are rearranged to form new substances
- 2. the simplest substances made up of only one type of atom
- 3. solution that turns cloudy when it reacts with carbon dioxide
- 5. what you are making in your chemical reaction
- 6. type of combustion when there is plenty of oxygen