Across
- 2. Substance written in letters and numbers
- 6. The starting substance in a chemical-reaction
- 8. Image or diagram
Down
- 1. Process when atoms rearrange
- 3. Atoms grouped together in a certain way
- 4. Something observed about a substance
- 5. Something made of the same atoms/group of atoms
- 7. Tiny pieces that all matter is made of