Why aren’t most pure metals found on the earth’s crust?

1 Answer
DocA
Feb 12, 2018

This depends on how reactive the metals are.

Explanation:

Reactive metals have reacted and are mostly found as oxides e.g. bauxite the ore for aluminium or carbonates e.g. malachite an ore of copper or sulphides e.g. iron pyrites for iron. It is the unreactive metals that can be found unconfined e.g. gold if you’re lucky enough to find any.

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