caption: 20 Problems with Lewis Structures Some atoms do not tend to follow the octet rule --B and Be often found octet deficient --Elements in the 3 rd Period or below often have expanded octets Some molecules have an odd number of electrons Impossible to accurately draw <PERSON> structure of molecules that exhibit resonance Sometimes the Lewis Structure does not accurately describe a structure that explains all the observed properties of the molecule The paramagnetic behavior of O 2
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