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Electronegativity values for elements are useful in predicting the following
(A) The bond energy of a molecule: More is the electronegativity difference between two atoms, more polar is the bond. Higher is the ionic character, higher will be the bond energy.
(B) The polarity of a molecule: More is the electronegativity difference between two atoms, more is the ionic character of the bond and more polar is the compound.
(C) Nature of an oxide: Difference in electronegativity between oxygen and element A predicts the nature of oxides formed by the element.
(a) If the difference is large, the oxide is basic (eg Na
2
O)
(b) If the difference is small, the oxide is acidic (eg SO
2
).
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