Essential Chemistry for IGCSE - Metals And Reactivity (Section 5 - No. 49)
What is the primary reason why aluminum appears unreactive despite being a reactive metal?
It has a high melting point.
It forms a protective oxide layer on its surface.
It does not react with oxygen.
It is a poor conductor of electricity.
Explanation
Aluminum forms a protective layer of aluminum oxide, which prevents further reactions.
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