This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The mantle is mostly made up of solid, dense and very hard rocks. It has also 44.8% oxygen, 21.5% silicon, and 22.8% magnesium, iron, aluminum, calcium, sodium, and potassium. Of course, these elements are bound together into rocks. All of the rocks are various oxides. The most common is SiO2 at 48%, followed by MgO – 37.8%.
2 4 2