The Biology Project: Biochemistry

Chemistry Tutorial

Problem 14: Electronegativity

Carbon and oxygen have electronegativities of 2.5 and 3.5 respectively. Which atom would make a covalent bond with hydrogen (electronegativity= 2.1) that has a higher degree of polarity?

C. both carbon and oxygen since covalent bonds always have the same polarity.
Covalent bonds between hydrogen and carbon or between hydrogen and oxygen have dramatically different polarities. C-H bonds are hydrophobic while O-H bonds are hydrophilic or polar.

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