magnesium
That element is Oxygen by 46.6%
Oxygen is the most abundant in the Earth's Crust 46.6% ElementApproximate % by weightOxygen46.6Silicon27.7Aluminum8.1Iron5.0Calcium3.6Sodium2.8Potassium2.6Magnesium2.1All others1.5
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
Aluminum :D
Silicon
The fifth most abundant element in the Earth's crust is potassium. It makes up about 2.6% of the Earth's crust by weight.
The most abundant element in Earth's crust is oxygen, making up about 46.6% of the crust by weight.
That would be silicon, or SiO2
silicon
Aluminum 7.5 to 8.1%
Siliconsilicon at 28%silicon!
The element found in both biotite mica and muscovite mica that makes up the greatest percentage by volume of Earth's crust is oxygen. Oxygen is a very abundant element in the Earth's crust, forming the majority of the minerals and rocks that make up the Earth's surface.