vocabulary part 1

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Across
  1. 5. negatively charge particle in the electron cloud
  2. 6. positively charged particle found in the nucleus of an atom
  3. 8. used to measure mass
  4. 10. center of the atom, containing the protons and neutrons
  5. 11. atom with different number of neutrons
  6. 12. non numerical data that is a member of a group or category
  7. 16. atom with different number of electrons
  8. 17. neutral particle found in the nucleus of an atom
  9. 19. organizes elements by their chemical properties
  10. 21. mass mass of the protons plus the neutrons
  11. 22. amount of matter in an object
Down
  1. 1. the ratio between mass and volume, how tightly packed the particles are
  2. 2. anything that has mass and takes up space
  3. 3. continuous numeric data
  4. 4. property that can be used to identify matter
  5. 7. used to measure volume
  6. 9. current model of the atom
  7. 13. outer energy _______ electrons
  8. 14. properties used to describe matter without causing change
  9. 15. smallest particles of protons and neutrons
  10. 18. amount of space matter takes up
  11. 20. smallest particle of a substance