Question

i need help with bond order
I need to figure out the;
net sigma bond =
net pi bond =
overall bond order =
for N_2

Answer 1

Diatomic nitrogen has a triple bond. The first bond is a sigma, and the rest are pi bonds.
net sigma bond = 1
net pi bond = 2
overall bond order = 3

Answer 2

Here's a good animation on sigma and pi bonds:
http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/bom5s2_6.swf

As for bond order, it is 1 if it is a single bond, 2 if double bond, 3 if triple bond. When you have resonance structures, it becomes a bit more complex with the delocalized orbitals and you might have non-integer bond orders.