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Question: Answered & Verified by Expert
Let electronegativity, ionisation energy and electron affinity be represented as EN, IP and EA respectively. Which one of the following equation is correct according to Mulliken?
ChemistryClassification of Elements and Periodicity in PropertiesAP EAMCETAP EAMCET 2001
Options:
  • A $\mathrm{EN}=\mathrm{IP} \times \mathrm{EA}$
  • B $\mathrm{EN}=\frac{\mathrm{IP}}{\mathrm{EA}}$
  • C $\mathrm{EN}=\frac{\mathrm{IP}+\mathrm{EA}}{2}$
  • D $\mathrm{EN}=\mathrm{IP}-\mathrm{EA}$
Solution:
1967 Upvotes Verified Answer
The correct answer is: $\mathrm{EN}=\frac{\mathrm{IP}+\mathrm{EA}}{2}$
Mulliken suggested that EN of an element is the average of its IP and EA.

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