Question

Which transition metal is known as Wonder metal?
(A) Tungsten
(B) Platinum
(C) Iron
(D) Titanium

Answer 1

Hint: Transition metals are placed in the d – block of the periodic table. Due to the electronic configurations of the various transition metals, each of these metals has certain unique properties. These properties could be of both physical as well as chemical nature.

Complete step by step solution:
One such unique element in the group of transition metals is Titanium. It is a metal that has an atomic number 22. Its mass number is 47.86 amu. It has an electronic configuration of \[[Ar]3{d^2}4{s^2}\]. It has a metallic lustre and is silver in colour. It is an element of transition series.
It is known as wonder metal because of its low density and high tensile strength. Also, titanium is resistant to corrosion in seawater, liquid chlorine and even in Aqua Regia.
Density of titanium is \[{\text{4}}{\text{.506g/c}}{{\text{m}}^{\text{3}}}\] and its tensile strength is about 434 MPa, which is almost equal to that of steel.

Hence the correct option is (D).

Note: Tensile strength is the maximum load a substance can withstand without breaking. It basically signifies how much load can a body withstand. Also, Aqua Regia is a mixture of nitric acid and hydrochloric acid in 1:3 ratio. Aqua regia is the only solution that can dissolve unreactive metals like Platinum.