Periodic Table Trends I

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Across
  1. 4. 3-lettered metal with 4 valence electrons
  2. 6. A Halogen
  3. 9. If you eat too much PeanutButter, it feels like this in your stomach
  4. 10. Metal with 3 valence electrons and 3 orbitals
  5. 11. The lightest Noble Gas
  6. 15. Metal that is liquid at room temperature
  7. 16. The air we breath is mostly made up of this gas
  8. 18. Superman's NobleGas?
  9. 20. The most reactive nonmetal
Down
  1. 1. The only metal more reactive than Cesium
  2. 2. Metal with 4 orbitals that is worth 5 cents?
  3. 3. Alkali Metal, also a Nirvana song
  4. 5. Has K for an atomic Symbol
  5. 7. Has 6 valence electrons and 2 orbitals
  6. 8. Alkaline Earth Metal with 4 orbitals
  7. 12. Coal, pencil-lead and diamond are all this element
  8. 13. Gas that is on the "metal side"
  9. 14. Metalloid used in rat poison
  10. 17. Has the largest radius of any element with 3 orbitals
  11. 19. Heavy, cancer-causing Noble Gas that is often in the basement of MN homes