How electronegativity depends upon nature of orbital

Electronegativity depends upon nature of orbital 

Electronegativity depends upon nature of orbital involved in bonding. The s orbital penetrates nearer to the nucleus than a  p orbital, therefor s orbital contributes more electronegative character. So it depends upon s and p character in sp3, sp2, and sp hybridization. For a carbon atom in sp hybridization has higher electronegativity (3.29) than sp2 (2.75) and sp3 (2.48) hybridized orbital.

Conclusion:

“Electronegativity increases as s character in hybrid orbital increases”


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