Which half-reaction is most easily reduced? a. al3+ + 3e- al = -1.66 v b. cu2+ + 2e- cu = 0.34 v c. fe3+ + e- fe2+ = 0.77 v d. na+ + e- na = -2.71 v e. pb2+ + 2e- pb = -0.13 v

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explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.