Most abundant element in earth crust: Oxygen

Oxygen, silicon, iron and aluminum are the most abundant elements in the Earth's crust, accounting for 88.1% of its mass. Earth’s Crust Elements The crust is a rigid surface containing both the oceans and landmasses. Most elements are found in only trace amounts within the Earth’s crust, but several are abundant. The Earth’s crust comprises about 95% igneous and metamorphic rocks, 4% shale, 0.75% sandstone, and 0.25% limestone. Siderophile Elements (Iron-Loving): Elements like iron, nickel, and platinum prefer bonding with metallic iron and are more abundant in the Earth’s core than in the crust. Oxygen is the most abundant element in the Earth’s crust. It is a vital component of rocks, minerals, and soil, primarily found in the form of oxides and silicates.