(1) Complete the MO diagram for CN by filling the table with the number of electrons in each orbital. What is the bond order of CN? Is this bond stable? ?* Solution molecular orbital filling--- CN- have electrons to filled in orbitals -- 6 + 7 + 1 = 14 ?1s 2 < ??1s 2 < ?2s < ??2s 2 < ?2px 2 =?2py 2 <?2pz 2 < ??2px=??2py < ??2pz bond order = 1/2 ( bonding e- - antibonding e-) 1/2 (10 - 4) = 3 B.O. = 3 it is unstable because C-N make 4 covalent bond to complete his octate for carbon atom but as N wants only 3 electrons to complete his octate it gains onw extra electron which makes it unstable... if you satisfied please like it... thanks... .