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Which of the following elements is the most abundant in the Earth's crust?
Silicon
Oxygen
Iron
Aluminum
Oxygen
Oxygen is the most abundant element in the Earth's crust, accounting for approximately 46.6 percent of its total mass. It primarily exists in the form of oxides, silicates, and carbonates, forming the bedrock of most minerals found in the crust.
Oxygen is the most abundant element in the Earth's crust, accounting for approximately 46.6 percent of its total mass. It primarily exists in the form of oxides, silicates, and carbonates, forming the bedrock of most minerals found in the crust.
The Earth's crust is the outermost solid shell of our planet, representing less than 1 percent of Earth's total volume, and it is part of the lithosphere, which includes the crust and the uppermost mantle.
Oxygen comprises about 46.6 percent of the Earth's crust by weight.
Silicon is the second most abundant element, making up roughly 27.7 percent of the crust.
Aluminum is the most abundant metal in the Earth's crust, followed by Iron.
The crust is categorized into continental crust (rich in silica and aluminum, hence called SIAL) and oceanic crust (rich in silica and magnesium, hence called SIMA).
Iron is the most abundant element in the Earth's total composition by mass, as it is the primary component of the Earth's core, even though it is less abundant in the crust.
Option A (Silicon) is the second most abundant element, Option C (Iron) is the fourth most abundant in the crust, and Option D (Aluminum) is the third most abundant.
B is correct тАФ Oxygen is the most abundant chemical element by mass in the Earth's crust.
For exams, distinguish between 'Earth's crust' (where Oxygen is #1) and 'Earth's total mass' (where Iron is #1). This is a common trap in RRB and SSC science sections.
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