periodic table croos word puzzle

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Across
  1. 1. smallest part of an element
  2. 4. another name for column
  3. 8. zig zag line
  4. 9. level One of a set of states of a physical system associated with a range of energies
  5. 12. an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
  6. 13. outer ring
  7. 15. number number on elment
  8. 16. positive
  9. 17. right of zigzag line
  10. 18. a negatively charged ion
  11. 19. neutral
Down
  1. 2. a wave function describing the state of a single electron in an atom
  2. 3. another name for row
  3. 5. law the law that the properties of the elements are periodic functions of their atomic numbers
  4. 6. to separate or change into ions
  5. 7. solid
  6. 10. negative
  7. 11. any of two having the same number of protons
  8. 14. what hydrogen is called
  9. 15. mass how you find the amount of protons and electrons