<P> Bond order is the number of chemical bonds between a pair of atoms . For example, in diatomic nitrogen N ≡ N the bond order is 3, in acetylene H − C ≡ C − H the bond order between the two carbon atoms is also 3, and the C − H bond order is 1 . Bond order gives an indication of the stability of a bond . An element with bond order value 0 cannot exist, but compounds can have a 0 bond value . Isoelectronic species have same bond number . </P> <P> In molecules that have resonance or nonclassical bonding, bond order does not need to be an integer . In benzene, where the delocalized molecular orbitals contain 6 pi electrons over six carbons essentially yielding half a pi bond together with the sigma bond for each pair of carbon atoms, giving a calculated bond order of 1.5 . Furthermore, bond orders of 1.1, for example, can arise under complex scenarios and essentially refer to bond strength relative to bonds with order 1 . </P>

What is the c-c bond order in c2h4o