Question

The most abundant element in earth’s crust is?
A.Hydrogen
B.Oxygen
C.Nitrogen
D.Silicon

Answer 1

Hint:You should know that It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Complete step by step answer:
-The Earth’s crust is important as it supports human and plant life. Every part of you and me is built from material taken from the Earth’s crust. As we know Earth’s crust is present in the lithosphere ( it is the rigid top layer of the earth).
-The most abundant element in the earth’s crust is Oxygen, which constitutes upto 46.6 %,( 467,100 parts per million of the earth’s crust). It generally exists as a major compound of the silicate minerals. It also exists as a compound in carbonates and phosphates. Oxygen has industrial, medical, and commercial purposes. It is used in hospitals to ease respiratory disease and can also be used to manufacture explosives among other numerous uses.
-Silicon is the second most common element present in the crust with an abundance of 276,900 ppm. At 80,700 ppm, aluminium is the third most abundant element in Earth's crust. Iron exists in the earth’s crust, and its composition is 50,500 ppm. Iron extracted in the form of iron ores existing in iron oxide forms such as hematite and magnetite.

Therefore, the most abundant element in earth’s crust is oxygen. Hence, option B is the required answer.

Note: You should know that more than 90% of the crust is composed of silicate minerals; only 8% of the crust is composed of non-silicates. All silicates have a significantly high amount of the oxygen element proportion.