ISBS #19-24 p. 51

19. a. 6 electrons
      b. 13 protons
      c. 82 electrons
      d. 17 protons

20. Only silver is electrically neutral.

21. a. anion
      b. neutral
      c. neutral
      d. cation
      e. cation

22. a. gaining electrons
      b. neutral
      c. neutral
      d. losing electrons
      e. losing electrons

23. a. H
      b. Na+
      c. Cl+
      d. I+

24. a. Potassium iodide
      b. Calcium sulfide
      c. Iron (III) bromide
      d. Barium hydroxide
      e. Ammonium phosphate
      f. Aluminum oxide