Question

What are four elements found in crust

Answer 1

Answer:

Earth's crust is made up almost entirely of eight elements, four of them alone claiming almost nine-tenths of this layer's total weight: oxygen comes in at 46.6 percent by mass, followed by silicon at 27.7 percent, aluminum at 8.1 percent and iron at 5 percent.

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Answer 2

Answer:

oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent.

Explanation:

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