Across
- 3. the amount of protons in an element
- 5. a sub atomic particle with no electrical charge
- 7. a positively charged sub atomic particle found in the nucleus of an atom
- 8. a negatively charged sub atomic particle found on the outside of an atom
- 9. a group of atoms bound together
Down
- 1. a mixture that is unevenly distributed
- 2. a mixture that is evenly distributed
- 4. the amount of space an object takes up
- 6. the basic unit of a chemical element
- 9. the amount of matter an object has