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