Across
- 4. the reaction of separating different elements
- 8. a singular element
- 10. a number that represents the amount of molecules
- 11. a grouping of atoms bonded together
Down
- 1. a substance that is unbreakable
- 2. takes part in chemical reaction, on left side of arrow
- 3. the result of chemical reactions
- 5. indicates the amount of an atom in a molecule
- 6. particles used as building blocks
- 7. when 2 or more elements combine
- 9. the amount of matter in an item