unit 4 (password is hello)

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Across
  1. 2. iron is part of this family
  2. 4. unit of measurement that shows the frequency
  3. 6. chlorine is part of this family
  4. 10. krypton is part of this family
  5. 11. element that has both the properties of metals and nonmetals
  6. 13. distance from the nucleus
  7. 14. unit of measurement that shows the energy
  8. 15. phosphorous is part of this family
  9. 17. selenium is part of this family
  10. 18. lithium is part of this family
  11. 19. element that has conductive properties
Down
  1. 1. when an electron absorbs energy and moves up to a higher energy level
  2. 3. includes lanthanides and actinides
  3. 5. the distance from one peak of a wave to another
  4. 7. the height of the waves
  5. 8. when an electron releases energy in the form of light and moves down to a lower energy level
  6. 9. number of waves per second
  7. 10. element that has dull properties
  8. 12. a reason elements in the same family have similar properties
  9. 16. calcium is part of this family