Problem: Which of the following substances have polar interactions (dipole-dipole forces) between molecules? F2, Cl2, ClF, NF3

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F2

total valence electrons: 14 e-

lewis structure


ΔEN = 0  nonpolar F-F bond

no dipole moment

nonpolar


Cl2

total valence electrons: 14 e-

lewis structure


ΔEN = 0  nonpolar Cl-Cl bond

no dipole moment

nonpolar


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Problem Details

Which of the following substances have polar interactions (dipole-dipole forces) between molecules? 

F2, Cl2, ClF, NF3