The two elements most abundant in the earth's crust are:

A) helium and hydrogen
B) iron and magnesium
C) sodium and potassium
D) silicon and oxygen
E) iron and nickel

Earth's Crust

The outermost layer of the Earth, composed of solid rocks and minerals, and divided into the thicker continental crust and the thinner oceanic crust.

Silicon

A chemical element with the symbol Si, known for its semiconductor properties and widespread use in computer chips.

Oxygen

A chemical element with symbol O and atomic number 8, essential for breathing in most living organisms and a key component of water.