Question

True or false? Aluminium is the third most abundant metal in the earth's crust.

Answer 1

A metal is a substance that has a shiny look when freshly produced, polished, or shattered, and conducts electricity and heat reasonably effectively. Metals are usually ductile or malleable. Metals can be chemical elements like iron, alloys like stainless steel, or molecular compounds like polymeric sulphur nitride. In physics, a metal is defined as any material capable of conducting electricity at absolute zero temperature. Under high pressures, several elements and compounds that aren't typically classed as metals become metallic.

Complete answer:
Aluminum is a chemical element with the atomic number 13 and the symbol Al. Aluminium has a lower density than most other common metals, around one-third that of steel. When exposed to air, it has a strong affinity for oxygen and produces a protective coating of oxide on the surface. Aluminium has a hue that is similar to silver and has a high capacity to reflect light. It is ductile, soft, and non-magnetic.
By mass, the Earth is around 1.59 percent aluminium (seventh in abundance by mass). Because aluminium quickly forms oxide and becomes bonded into rocks, it stays in the Earth's crust, whereas less reactive metals sink to the core, the Earth's crust has a higher proportion of aluminium than the rest of the Universe. Aluminium is the most abundant metallic element in the Earth's crust (8.23 percent by mass) and the third most plentiful element overall (after oxygen and silicon). Aluminium is found in a vast number of silicates in the Earth's crust. The Earth's mantle, on the other hand, is just 2.38 percent aluminium by mass. Aluminium is found at a quantity of $2\text{ }\mu g\text{ }per\text{ }kg$ in saltwater.
The third most prevalent element in the earth's crust is aluminium (not metal).
The most prevalent elements in the earth's crust are oxygen, silicone, aluminium, iron, calcium, sodium, potassium, magnesium, titanium, and hydrogen.
The first three (percent by weight) are: oxygen (46.1%), silicone (28.12%), and aluminium (8.23 percent ).

Note:
Despite the fact that aluminium is a common and pervasive element, not all aluminium minerals are commercially viable. Bauxite $Al{{O}_{x}}{{\left( OH \right)}_{32x}}$ is the mineral from which almost all metallic aluminium is made. In tropical climates, bauxite forms as a weathering product of low iron and silica bedrock. Australia, China, Guinea, and India extracted the most bauxite in 2017.