Across
- 2. the smallest building block of matter
- 5. Matter that has a indefinite shape and a indefinite volume
- 6. The center of an atom that contains protons and neutrons
- 9. Matter that has a indefinite shape and a definite volume
- 10. A particle with no charge
Down
- 1. A positively charged particle
- 3. The amount of matter an object contains
- 4. Matter that has a definite shape and a definite volume
- 7. A negatively charged particle
- 8. Something that has mass and takes up space