Across
- 2. takes up the shape of its container
- 4. moves freely
- 6. positive part of the nucleus
- 7. something made up of the same atoms
- 9. the amount of matter in an object
- 10. makes up every object
- 11. a neutral part of the nucleus
Down
- 1. a negative part of the atom that surrounds the nucleus
- 3. the amount of space an object takes up
- 5. an object that keeps its shape
- 8. needs mass and volume