Chapter 22, Problem 22.3QP

Interpretation Introduction

Interpretation:

The reason for highest melting point of Molybdenum among the fifth period elements has to be outlined.

Concept Introduction:

In the periodic classification of elements, elements are classified into s-block elements, p-block elements, d-block elements and f-block elements.  The d-block elements (group $3-12$) are referred to as transition elements.

All of the Transition elements are metals and belong to period $4-7$ and group $3-12.$

The transition elements in the fifth group are Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver and Cadmium.

Atomic number of Molybdenum is $42$ and its Electronic configuration is $1s^2{\text{2s}}^{2}2p^6{\text{3s}}^2{\text{3p}}^6{\text{3d}}^{10}{\text{4s}}^2{\text{4p}}^6{\text{4d}}^5{\text{5s}}^1$.