Number of molecules having bond order 2 from the following molecules is ________ ( C ₂, O ₂, Be ₂, Li ₂, Ne ₂, ~N ₂, He ₂ )

Step-by-step solution

aligned & C ₂ & (12 e ⁻ ): 1 ~s ^2, ^* 1 ~s ^2, 2 ~s ^2, ^* 2 ~s ^2 [ 2 p _ x ^2= 2 p _ y ^2 ] & B.O. = 8-4 2 =2 & O ₂ & (16 e ⁻ ): 1 ~s ^2, ^* 1 ~s ^2, 2 ~s ^2, ^* 2 ~s ^2, 2 pz ^2 & [ 2 p _ x ^2= 2 p _ y ^2 ] [ * 2 p _ x ^1= * 2 p _ y ^1 ] & B.O. = 10-6 2 =2 & Be ₂ & (8 e ⁻ ): 1 ~s ^2, ^* 1 ~s ^2, 2 ~s ^2, ^* 2 ~s ^2 & B.O. = 4-4 2 =0 & Li ₂ & (6 e ⁻ ): 1 ~s ^2, ^* 1 ~s ^2, 2 ~s ^2 aligned aligned & B.O. = 4-2 2 =1 & Ne ₂ & (20 e ⁻ ): 1 ~s ^2, ^* 1 ~s ^2, 2 ~s ^2, ^* 2 ~s ^2, 2 pz ^2 & [ 2 p _ x ^2= 2 p _ y ^2 ]