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