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For Lewis Structures with different lengths of bonds, will the bond lengths for each always be somewhere in between the length of the longest and shortest bond? I know that single bonds are usually longer than shorter bonds, and triple bonds are even shorter.
Lewis structures with resonance structures will have bond lengths that average the lengths of all of the bonds in the structure, as a resonance structure is the blended average of all different structures. However, if there is only one structure, then single bonds (denoted with a single line) are longer that double bonds (denoted with two lines) which are longer than triple bonds (denoted with 3 lines). If the atoms involved are larger, and the bond order is the same, I believe larger molecules will have longer bonds.
This is only true if a structure has resonance (where you could move the double/triple bond to multiple locations) because this is where the resonance hybrid is. In other instances, the lengths of bonds would be more reflective of the type of bond as well as the size of the atoms involved.
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