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The ionisation potential and electron affinity of an element $X$ are $275$ and $86$ kcal/mole. Then the electronegativity of $X$ according to Mulliken scale is:

4.0

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3.5

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2.8

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Solution

The correct option is C $2.8$
By Mulliken scale formula,

$E N_{X} = \frac{(I P + E A)}{128}$

$E N_{X} = \frac{275 + 86}{128} = 2.8$

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The ionisation potential and electron affinity of an element X are 275 and 86 kcal/mole. Then the electronegativity of X according to Mulliken scale is:

The correct option is C 2.8By Mulliken scale formula,ENX=(IP+EA)128ENX=275+86128=2.8

The ionisation potential and electron affinity of an element $X$ are $275$ and $86$ kcal/mole. Then the electronegativity of $X$ according to Mulliken scale is:

The correct option is C $2.8$
By Mulliken scale formula,

$E N_{X} = \frac{(I P + E A)}{128}$

$E N_{X} = \frac{275 + 86}{128} = 2.8$