If the ionisation energy and electron affinity of an element are 275 and 86 kcal mol-1 respectively, then the electronegativity of the element on the Mulliken scale is

Question

If the ionisation energy and electron affinity of an element are 275 and 86 kcal mol-1 respectively, then the electronegativity of the element on the Mulliken scale is (A) 2.8 (B) 0.0 (C) 4.0 (D) 2.6

Tardigrade Admin · Accepted Answer

According to Mulliken, electronegativity of an atom is average of ionization energy and electron affinity (in eV).

n X_{m} = \frac{IE + EA}{2}

If ionization energy and electron affinity are in

k c a l m o l^{- 1}

.

n = \frac{IE + EA}{125} = \frac{275 + 86}{125} = 288

Q. If the ionisation energy and electron affinity of an element are 275 and 86kcalmol−1 respectively, then the electronegativity of the element on the Mulliken scale is

2.8

0.0

4.0

2.6

According to Mulliken, electronegativity of an atom is average of ionization energy and electron affinity (in eV). nXm​=2IE+EA​ If ionization energy and electron affinity are in kcalmol−1. n=125IE+EA​=125275+86​=288

Q. If the ionisation energy and electron affinity of an element are $275$ and $86 k c a l m o l^{- 1}$ respectively, then the electronegativity of the element on the Mulliken scale is

According to Mulliken, electronegativity of an atom is average of ionization energy and electron affinity (in eV).
$n X_{m} = \frac{IE + EA}{2}$
If ionization energy and electron affinity are in $k c a l m o l^{- 1}$ .
$n = \frac{IE + EA}{125} = \frac{275 + 86}{125} = 288$