Elements and Compounds
Metal and Alloys

Why aluminum less reactive than it is in its reactive series?

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Answered 2007-07-07 07:19:51

Aluminum is exactly as reactive as it is in the reactivity series. However, when aluminum reacts, with oxygen for instance, a thin layer of aluminum oxide builds up on the outside of the aluminum metal. This prevents more oxygen from reaching unreacted aluminum metal. This prevents the reaction from proceeding further, thus effectively protecting the aluminum metal from further reaction.

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