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what is silicon, oxgyen, aluminum chemical composition. A. crust B. mantle C. cores​

Sagot :

Answer:

A. Crust

Explanation:

The most common chemical elements in the crust are oxygen (46.6%), silicon (27.7), aluminum (8.1), iron (5.0), calcium (3.6), potassium (2.8), sodium (2.6), and magnesium (2.1). These figures vary among different studies because we really have no way to know for sure.

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