Iron is one of the most widespread elements on the Earth. It makes up approximately 5 percent of the Earth's crust. Much of this iron is found in such small concentrations in other rocks, however, that it cannot be used economically for mining.
The chemical element iron is the fourth most common element in the Earth's crust and the second most abundant metal. Its chemical symbol, Fe, is taken from the Latin word ferrum.
Metal is chemically active and is found in nature combined with other elements in rocks and soils.
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