Periodic Table

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Across
  1. 1. Metals that have 1 valence electron
  2. 3. Contains iron, cobalt, and nickel
  3. 5. When the outer ring only needs one electron to be full
  4. 8. This element's symbol is "Na"
  5. 9. A bond formed when two nonmetals bond
  6. 10. When an atom has a charge
  7. 11. First scientist to organize the periodic table
  8. 13. Located at group 17, period 2
  9. 17. The rows on the periodic table
  10. 18. The columns on the periodic table
  11. 19. Located right of the stairstep line
  12. 20. Located left of the stairstep line
Down
  1. 2. A bond formed when a nonmetal and metal bond
  2. 4. The number of protons in the nucleus
  3. 6. This element is needed to breath
  4. 7. Along the stairstep line
  5. 12. This element's symbol is "K"
  6. 14. Positive ions
  7. 15. Metals used in coins and jewelry
  8. 16. Gases that are found in group 18
  9. 18. This element's symbol is "Au"