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calcium is!
goyttret
Oxygen is the most abundant element in Earth's crust.
Hydrogen is the most common element in the universe, and in the Sun.
The 21st most abundant element in the Earth's crust is Chlorine (Cl). It forms 0.05% of the Earth's crust.
The metal that is most abundant in the lithosphere is iron. Over 5.6 percent of Earth's mass is comprised of iron.
Oxygen
Silicon is the most abundant chemical element in the Earth crust.
calcium is!
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
silicon
Aluminum 7.5 to 8.1%
Siliconsilicon at 28%silicon!
goyttret
That would be silicon, or SiO2
The most abundant metal in the earth crust is aluminium.
silicon.