Identify the element that is most prolific in the crust of the earth.

Options

A. Iron
B. Silicon
C. Oxygen
D. Hydrogen

Answer

C

Explanation

Oxygen is the most abundant element in the Earth.s crust, making up 467, 100 ppm (parts per million) of the Earth.s crust, or 46.6%. It exists as a major compound of the silicate minerals where it combines with other elements. It also exists aas a compound in carbonates and phosphates. Silicon is the second most common element pre-sent in the crust with an abundance of 276,900 ppm (27.7%).