Across
- 2. Components that can not be observed separately
- 6. Physically combined
- 7. Chemically combined
- 9. Chemical Formula
- 10. Chemical Symbol
Down
- 1. Consists of 1 kind of atom
- 3. Anything that has mass or takes up space
- 4. Smallest unit of matter
- 5. Components that can be observed separately
- 8. Center of an atom