Question

Second and third most abundant metal in earth’s crust:
(A) Aluminium, Calcium
(B) Iron, silver
(C) Iron, Calcium
(D) None

Answer 1

Hint: It is a metal that belongs to the first transition series and group 8 of the periodic table. It is used to make alloys steels like carbon steels with additives such as nickel, vanadium, manganese etc. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.

Complete step by step answer:
Let us know about the most abundant metal on earth.
> About eight percent of the Earth's crust is aluminum, making it the most abundant metal on this planet. However, it is always found combined with various other elements, never by itself in a pure state. Two of the most frequently encountered aluminum compounds are alum and aluminum oxide.
> Now, let us consider the question.
- The second most abundant metal in the earth is iron and third one is calcium. 5.0% of iron and 3.6% of calcium, followed closely by Na, K, Mg and Ti.
- The elements from carbon to iron are relatively more abundant in the universe because of the ease of making them in supernova nucleosynthesis. Calcium is rarely found in its elemental form.
Hence, iron and calcium are the second and third most abundant metals in earth’s crust. Therefore, option C is the required answer.

Note: Calcium is readily found throughout the Earth mostly in the form of rocks and minerals such as limestone (calcium carbonate), dolomite (calcium magnesium carbonate), and gypsum (calcium sulfate). It is the fifth most common element in the Earth's crust.