No Bond Is 100% Ionic Bond!!!|Electronegativity Difference Criteria for Nature of Chemical Bond|

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Yes! There is no 100% ionic bond exist in chemistry. We can explain it by electronegativity difference bases.

Electronegativity difference is the criteria for deciding the nature of a chemical bond either ionic or covalent. If a bond has electronegativity difference of 1.7 between bonded atoms than bond would be ionic in nature. For a 100% ionic bond this difference should be 4 because most electronegative element in periodic table is Flourine with electronegativity value of 4. That is only possible if electronegativity of other bonded atom become zero. We know in periodic table the minimum electronegativity is 0.7 of Cs atom.

Hence maximum electronegativity difference in a bond  till now calculated is 3.3 in CsF.

Electronegativity of Flourine= 4
Electronegativity of Cesium=0.7
Electronegativity difference=4 - 0.7= 3.3

Hence, there is no 100% ionic bond exist in chemistry.



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