There are actually quite a few elements present in the earth's crust. The most abundant would be oxygen and silicon.
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The most abundant element in Earth's mantle is oxygen, which combines with other elements such as silicon, magnesium, and iron to form the majority of minerals found in the mantle. Oxygen makes up about 44% of the mantle by weight.
The asthenosphere is part of the upper mantle of the Earth. This part of the mantle contains iron and magnesium.
Oxygen is not found in large quantities in the Earth's mantle as it is more abundant in the Earth's crust and atmosphere compared to the mantle. The most abundant elements in the Earth's mantle are oxygen, silicon, magnesium, and iron.
Hydrogen is the most common element in the universe, and in the Sun.
Oxygen is the most abundant element by volume in Earth's atmosphere, making up about 21% of the air we breathe.
The most abundant element in Earth's crust is oxygen, making up about 46% of its mass. Silicon is the second most abundant element, comprising about 28% of the Earth's crust.
Oxygen is the most abundant element in Earth's lithosphere, comprising about 45% of its mass.