Atoms

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Across
  1. 6. number number of protons plus the number of electrons
  2. 7. the center of an atom
  3. 9. negative charge
  4. 10. all parts the same
  5. 11. able to be stretched
  6. 13. symbol letters representing something
  7. 14. neutral charge
  8. 15. number number of protons plus the number of neutrons
Down
  1. 1. a part or aspect of something
  2. 2. positive charge
  3. 3. building block of all things
  4. 4. table table of elements
  5. 5. any of two or more forms of a chemical element
  6. 8. all parts different
  7. 12. electrons an electron of an atom located in the outer most shell