Fluorine molecule (F2) –
F (9) 1s2 2s2 2p5
Two fluorine atoms bring 7 electrons each to the table and thus the 10 electrons get arranged in the MOs formed as follows –
Electronic configuration –(σ1s)2 (σ2s)2 (σ2s)2 (σ2p)2 (π2p)4 (π2p)4
There are no unpaired electrons in the molecular orbitals of fluorine and so it’s diamagnetic i.e it has no permanent magnetic dipole moment.
∴Bond order for F2 molecule = 1/2 ( 8-6)= 1
Thus, there is a single bond between two F atoms.
From the next post we shall start studying heteronuclear molecules.Till then ,
Be a perpetual student of life and keep learning…
Good Day !