Question

Which transition metal has the lowest melting point?
(A) \[Zn\]
(B) \[Cr\]
(C) \[Ti\]
(D) \[Ni\]
(E) \[Co\]

Answer 1

Hint: Transition metals are the metals present in d-block of the periodic table. These are usually in group 3 to group 12. In transition metals, the melting point depends on the presence of electrons in d-orbitals and also on the strength of metallic bonds formed.

Complete answer:
(1) The transition metals [element] have high melting and boiling points.
(2) This is due to the overlapping of ‘d’ orbitals and covalent bonding of the electrons. Which are not paired d-orbital electrons.
(3) Zinc has completely filled d-orbitals. They cannot form covalent bonds.
(4) Zinc is slightly brittle metal at room temperature.
(5) When oxidation is remained it appears as blue-silvery.
(6) The melting point of Zinc is ${419.53^\circ }C,{787.15^\circ }F.$
(7) Zinc is used for galvanizing iron sheets or wires.
(8) It is also used in making alloys such as brass [the alloy with copper].
(9) The electronic configuration of Zinc is $[Ar]3{d^{10}}4{s^2}.$
(10) The most common ore of Zinc in Sphalerite, a Zinc Sulfide mineral.
(11) Zinc is required for the function of our $300$ enzymes.

Therefore, form the above explanation the correct option is (A) $Zn.$

Note:
Transition metals usually have high melting points compared to other elements in the periodic table. Melting point of transition metals first increases and then decreases. This happens due to the formation of strong metallic bonds.
Zinc is widely used as alloys as well as in batteries and in other electrical equipment.