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I was wondering if there is a difference between induced dipoles vs permanent dipoles from todays lecture? I think induced is from elements that have similar electronegativities and or are the same while permanent is from two dramatically different electronegativities and was wondering if that was right?
Hello! Yes you're correct. Permanent dipole moments arise when bonding occurs between elements of differing electronegativities, while the Induced (or temporary) dipole moments occur when an external electric field distorts the electron cloud of a neutral molecule.
Just as you said, permanent dipoles are from two atoms having different electronegativities (thus one atom will always be partially positive and the other partially negative). On the other hand, induced dipoles are temporary fluctuations in electron density that randomly cause dipoles to form.
These are some really good explanations. Also, an induced dipole can be seen in dispersion bonds, while a permanent dipole can be seen in dipole-dipole bonds and ion-dipole bonds.
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