Question

With the help of molecular orbital diagram show that Ne₂ cannot exist as stable molecule. (Atomic number of Ne = 10).

Answer 1

Ne₂ (20) = σ1s² σ*1s², σ2s² σ*2s², σp_x²

π 2p_y² 2π* 2p_y²π*2p_y² 2p_z² σ*

2px²

B.O = 1/2 (10 - 10) = 0

Ne₂ cannot exist because its bond order is zero.