100 % of Earth's crust is composed of elements in the form of varying minerals and other matter!
That element is Oxygen by 46.6%
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
Aluminum 7.5 to 8.1%
silicon
Siliconsilicon at 28%silicon!
Oxygen is the most abundant element in the Earth's crust, making up about 46.6% of its mass.
silicon.