Across
- 3. Made up of two or more separate elements
- 5. Combination of two substances that are not chemically bonded together
- 8. Has mass and takes up space
- 9. A negative charged particle
- 11. C
- 12. AU
Down
- 1. TI
- 2. A group of atoms bonded together
- 4. S
- 6. The building block of matter
- 7. H2O
- 10. O