Question

Which element is most abundant in the earth's crust?

Answer 1

The term "crust" refers to a planet's outermost shell. All known life in the universe is contained within Earth's thin, 40-kilometer (25-mile) deep crust, which makes up only $1$ of the planet's mass. The crust, mantle, and core are the three layers of the Earth. Solid rocks and minerals make up the crust. The mantle, which lies beneath the crust, is mostly made up of solid rocks and minerals, but it is punctuated by malleable rocks and minerals.

Complete step by step solution:
The Earth's crust is a thin shell that covers the planet's surface and makes up less than 1% of its total volume. It is the uppermost layer of the lithosphere, which also includes the crust and the uppermost part of the mantle. The lithosphere is divided into tectonic plates, which move around and allow heat to escape from the Earth's interior into space.
The crust sits on top of the mantle, which is a stable configuration because the upper mantle is made of peridotite, which is much denser than the crust. The Mohorovii discontinuity, which is defined by a difference in seismic velocity, is traditionally used to define the boundary between the crust and the mantle.
Oxygen is the most abundant element in the earth's crust ($46.1$ ). Oxygen (dioxygen) has a chemical formula ${{O}_{2}}$. Because oxygen usually combines with another oxygen by forming a covalent bond, this formula is given.
The Oxygen Composition of the Atmosphere
The oxygen content of the atmosphere is $21\%$.
It is required for breathing and is used by all living things.
It is required for burning.
Thus, oxygen is most abundant in the earth's crust.

Note:
The crusts of most terrestrial planets are fairly uniform. However, there are two types of crust on Earth: continental crust and oceanic crust. The chemical compositions and physical properties of these two types differ, and they were formed through different geological processes.