19. a. 6 electrons
b. 13 protons
c. 82 electrons
d. 17 protons
20. a. no
b. no
c. yes
d. no
21. a. anion
b. neutral
c. neutral
d. cation
e. cation
22. a. gained electrons
b. neither
c. neither
d. lost electrons
e. lost electrons
23. a. H
b. Na +
c. Cl -
d. Al 3+
24. a. Potassium Iodide: KI
b. Calcium Sulfide: CaS
c. Iron Bromide: (Fe)(Br)3
d. Barium Hydroxide: Ba(OH)2
e. Ammonium Phosphate: (NH4)3(PO)4
f. Aluminum Oxide: (Al)2(O)3
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