Haha

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Across
  1. 3. gases, Group 8A on the periodic table
  2. 4. point, it increases moving from group 1A and 2A on the periodic table determines if a solid will melt
  3. 6. metals, group 1A on the periodic table
  4. 8. negativity, increases left to right across and top to down when it decreases fluorine has the highest EN
  5. 9. metals, contains oxygen sulfur selenium phosphorus nitrogen and carbon
  6. 11. Character, determines if a element to lose electrons to make ions or cations increases right to left and top and down
  7. 12. Group 7A on the periodic table
  8. 13. Energy, increases left to right decreases too to bottom helium has the highest ionization
Down
  1. 1. earth metals, Group 2A on the periodic table
  2. 2. affinity, same trend with ionization energy and changes if you add an electron to a gaseous atom
  3. 5. metals, Groups 3-12
  4. 7. radius, decreases left to right it’s the size of an atom
  5. 10. contain boron silicon arsenic tellurium germanium and antimony