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Oxygen and Iron
Oxygen and Silicon
Silicon and Iron
Silicon and Aluminium
Oxygen is the most abundant element in the earth's crust, comprising 46.6% or the crust by weight. Silicon 28%, aluminum 8.2%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium, 2.0%, and titanium 0.61% also comprise the crust.
By: Barka Mirza ProfileResourcesReport error
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