Most abundant element in earth crust: Learn how oxygen

Learn how oxygen, silicon, aluminum, iron and calcium dominate the Earth's crust, while nitrogen, oxygen, argon, carbon dioxide and neon rule the atmosphere. Discover how hydrogen, helium, oxygen, carbon and neon are the most common elements in space. The most abundant element on Earth, by mass, is iron. While oxygen reigns supreme in the Earth’s crust, iron constitutes the vast majority of the Earth’s core, making it the champion in terms of overall elemental abundance. Silicon is second most abundant element in the Earth's crust, and accounts for 28% of the crust’s mass. Silicon is an essential material in the manufacture of electronics and computer chips. Element Abundance in Earth's Crust