Question

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

• A. 2.8
• B. 0.0
• C. 4.0
• D. 2.6

Hint:

Mulliken electronegativity is the average of ionisation energy and electron affinity, measured in eV.

Answer 1

The Correct Option is A

The Mulliken electronegativity is calculated as the average of the ionisation energy and electron affinity. The value is \( 2.8 \) for the given data.