The number of valence electrons present in th | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The enthalpy of atomisation depends on the number of unpaired electrons available for metallic bonding. Among the given transition metals ($Cr$,$C

Vedclass · Accepted Answer

$6$

Vedclass · Answer

(C) The enthalpy of atomisation depends on the number of unpaired electrons available for metallic bonding. Among the given transition metals ($Cr$,$Co$,$Fe$,$Ni$),$Cr$ has the lowest enthalpy of atomisation because it has a stable $d^5$ configuration,which limits the number of electrons participating in metallic bonding compared to others.For $Cr$ $(Z=24)$,the electronic configuration is $[Ar] 3d^5 4s^1$.The total number of valence electrons is the sum of electrons in the outermost $s$ and $d$ orbitals.Valence electrons = $5 (d) + 1 (s) = 6$.

The number of valence electrons present in the metal among $Cr$,$Co$,$Fe$,and $Ni$ which has the lowest enthalpy of atomisation is

Similar Questions

An element of atomic number $29$ belongs to

Why are $Mn^{2+}$ compounds more stable than $Fe^{2+}$ towards oxidation to their $+3$ state?

Formation of a coloured solution is possible when the metal ion in the compound contains:

Which of the following is $NOT$ a characteristic of the transition elements in the series from scandium to zinc?

Which of the following metal ions has a pink color?

Vedclass Test Series

Exam Paper Generator

Online Exam Module