Question

b) Which of the following metals does the outer layer of mantle contain?
i. Aluminium
ii. Silicon
iii. Calcium
iv. All of these
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Answer 1

Explanation:

In terms of its constituent elements, the mantle is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium. There's also iron, aluminum, calcium, sodium, and potassium. These elements are all bound together in the form of silicate rocks, all of which take the form of oxides

Answer 2

Answer:

All of these

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