Across
- 4. the amount of matter in an object
- 7. makes up and element
- 8. positive perky patty
- 9. are packed tightly together and move very slowly
- 10. take the shape of any container
- 12. pediatric table
- 14. volume and mass needed
- 15. neutral
Down
- 1. is the total number of protons and neutrons
- 2. the capital and lower case letters
- 3. he mass of an atom of a chemical element
- 5. the particles move rapidly in all directions
- 6. how much space occupied by an objector a substance
- 11. the number of protons in the nucleus of an atom
- 13. not aloud in arcade