Silicon, in the form of silica (quartz) and composed of silicon dioxide or SiO2.
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
That would be silicon, or SiO2
silicon.
Silicon is the second most abundant element on earth. Silicon dioxide and silicates (salts derived from silicon dioxide) make up approximately 87% of the materials in the earths crust. Oxygen is the most abundant, making up slightly less then 50% of the total mass of the earth's crust, waters, and atmosphere.
On planet earth, silicon is the second most abundant element. It comprised 28 percent of the earth's crust. The most abundant is oxygen, which makes up about 47 percent of the earth's crust. The second most abundant element in the universe is helium.
Hydrogen is the most abundant element in the known Universe; helium is second.
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Silicon is the second most abundant element in Earth's crust.
Hydrogen is the most abundant element in the known Universe; helium is second.
Oxygen at 20.9%
Helium!
Silicon.