Question

Without drawing out correlation diagrams in detail for each 2^nd period homonuclear diatomic molecule separately please show how simple MO theory explains the trends observed in the properties of these molecules shown in the graph. Recall that there are two different energy level orderings, one for Li₂ through N₂ and a different one for O₂ and F₂. You might wish to draw these out separately and write out the electron configurations to explain your answer. Please include the ions in your response.

Answer 1

molecular orbital diagram gives us the information about the magnetic properties, bond order, bond length and bond strength also.

if there present any unpaired electrons in any molecular orbital then molecule will be paramagnetic.

bond order = 1/2 [ difference between number bonding orbital electron - number of electrons in anti bonding molecular orbital]