2SAS 26-28, 29-34 p. 132

26. Metallic atoms more easily than do nonmetal atoms.

27. This indicates that they are chemically inert.

28. a. Na: Cation
      b. Ca: Cation
      c. F: Anion
      d. Cu: Anion
      e. O: Anion
      f. Li: Cation
      g. Sn: Anion
      h: I: Anion

29. Oxygen because the element is still the same, it just has a greater mass by 2.

30. (156+254)/2= 205 pm

31. a. sun exposure/chemical reaction
      b. exposure to different heat/ chemical reaction
      c. sun exposure/chemical reaction

32. a. Bromine
      b. Silicon

33. In the Snake River experiment, we used information such as rainfall and how much of a chemical was used; similarly, Mendeleev used the atomic weight and characteristics to make the periodic table and guessed correctly what elements were missing.

34. Nickel has a higher atomic number than Cobalt but a lower atomic weight.