If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal m o l - 1 respectively, then the electronegativity of the element on the Pauling scale is

Question

If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal m o l - 1 respectively, then the electronegativity of the element on the Pauling scale is, 2.8, 0.0, 4.0, 2.6

MARKS App · Accepted Answer

I.E. + E.A = 275 + 86 = 361 kcal m o l - 1 = 361 × 4.184 = 1510.42 kJ m o l - 1 electronegativity = I . E . + E . A . 540 So, electronegativity = 1510.42 540 = 2.797 = 2.8

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