chemistry

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