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