1. We know px,py,pz are degenerate orbitals... My question is suppose in 0=[He] 2s^2 2px^2 2py^1 2pz^1 Are the px,py,pz orbitals degenerate here? 2. What is the reason of inert pair effect? 3. What is the order of shielding effect for s,p,d,f?