Bond order: What is bond order?


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The bond order, defined in terms of the Lewis formula,is the number of pairs of electrons in a bond.

For example:  in C-C bond the bond order is 1 (single bond); in C=C the bond order is 2 (double bond).

BOnd length depends on bond order as bond strength increases and nuclei are pulled inward,decreasing the bond length.Take a look at carbon-carbon bonds.The average C-C bond length is 154 pm,whereas C=C is 134 pm and c triple bond is 120 pm long.