Why is aluminium more reactive than lead?
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The reactivity of a metal is related to its position within the electrochemical seriesThe values of the reduction potential (voltages) relative to hydrogen are roughly proportional to the electronegativities of the metalsAluminum has a lower electronegativity than does lead, and so aluminum has a greater tendency to be oxidized, that is, to lose electrons, and reactIn practice, we find that aluminum metal is very nonreactive, but that is because of a passivating layer of aluminum oxide, Al2O3.
