Hydrogen fluoride has two characteristics.1.electronegativity differencethan 1.72.sharing electrons    first characteristic is shown by ionic bonds while second characteristic is shown by...

Hydrogen fluoride has two characteristics.
1.electronegativity differencethan 1.7
2.sharing electrons
    first characteristic is shown by ionic bonds while second characteristic is shown by covalet bonds. so does hydrogen fluoride is covalent or ionic

Asked on by rananjan

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llltkl | College Teacher | (Level 3) Valedictorian

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Chemical bonds are classified as ionic or covalent depending upon the nature of interaction between the constituent atoms and electronic involvement in such interactions. Sharing of electrons between atoms for covalent bonds while transfer of electron/s followed by electrostatic attraction forms ionic bonds. In actual practice, however, very few molecules possess ‘pure’ bonds. Most of the common molecules seem to have crossed this boundary and exhibit signs of bonding through more than one way for the same bond. Thus comes the idea of partial ionic character of covalent bonds and transition from ionic to covalent character. Greater the electronegativity difference between two atoms, higher is the partial ionic character of that particular bond.  There is a formula to compute the percent ionic character of a bond as a function of electronegativity difference of constituent atoms:
%IC = [1-exp(-0.25(χA- χB)^2]*100
Using this equation gives
%IC of H-F = {1- [e^-(1.7)^2/4] }*100   =[1-0.43]*100 = 57%

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