Across
- 2. Replacement : when two elements in two different compounds switch places
- 5. : when a compound breaks down into more elements
- 8. : small things that make up our universe
- 11. Replacement : when one more reactive element replaces another in a compound
- 12. : Very light gas that is in our air
- 13. : positive charged atom
- 14. : negatively charged atom
- 15. : solid but used in many foods
Down
- 1. Number : 6.02 x 10^35
- 3. : a process to figure out things like Mass of A to Mass of B
- 4. : a compound breaking down
- 6. : the major component of our air
- 7. : a process plants undergo
- 9. : used in balloons
- 10. : odorless fatal chemical that is used in salt