what is the energy level diagram of N₂ and F₂?

The atomic number of Nitrogen is 7 and the electronic configuration is 1s² 2s²2p_x¹2p_y¹2p_z¹. N₂ molecule is consists of 2 N-atoms, the total number of electrons in N₂ molecule is 14. In N₂ molecule's energy level diagram can be drawn as:

On the similar basis, try to draw the molecular orbital diagram of F₂ molecule yourself. The atomic number of F is 9 and its electronic configuration is 1s² 2s²2p_x²2p_y²2p_z¹. The total number of electrons in F₂ molecule will be 18. A point to remember here, is that F₂ molecule has more than 14 electrons, therefore, the molecular orbital (σ2p_z) will have lesser energy than molecular orbitals (π2p_x=π2p_y).