Question

Ionisation energy of Cl is x eV/atom and electron affinity is y eV/atom, then electronegativity on Mulliken scale is

1. (x+y)/2.

2. (x-y)/2

3. (x+y)/4

4. (x+y)/540​

Answer 1

Answer:

Given IE=10 eV and EA=6.8 eV

Mulliken electronegativity which is defined as the average of the ionization energy and electron affinity of an atom (both in eV).

EN

Mulliken

=

2

10+6.8

=8.4

Mullikens electronegativity value is about 2.8 times as large as Paulings electronegativity value.

So, EN

Pauling

=

2.8

8.4

=3