Across
- 1. cylinder
- 4. nucleus
- 6. degree of compactness of a substance.
- 8. A group of atoms bonded together
- 9. atom's central core, containing protons
- 10. unit of matter
- 12. a small particle in the nucleus of the atom, with
Down
- 2. nucleus
- 3. negatively charged particle
- 4. of space occupied by an object
- 5. to measure the volume of a liquid
- 7. charged particle
- 11. atom's central core, containing protons and neutrons.
- 13. electrical charge