Across
- 2. used to measure pressure
- 4. volume is proportional to temperature
- 10. group of atoms joined together
- 11. an atoms attraction to a shared electron
- 13. charged atom
- 14. a substance that can't be broken down any further
Down
- 1. number of protons in an atom
- 3. donates a proton
- 5. energy that is needed to start a chemical reaction
- 6. chemical reaction caused by heat
- 7. recieves a proton
- 8. a substance that speeds up a chemical reaction
- 9. volume is inversely proportional to pressure
- 12. a substance made by two different elements