Our 2nd Annual Scheuermann's Disease Fundraiser on the afternoon of Sunday October 4th has now been posted to the VisitPitsburgh website. ... VisitPittsburgh is a website designed to help people plan their next visit to Pittsburgh, PA.
An antibonding orbital is a molecular orbital containing an electron outside the region between the two nuclei. As two atoms approach each other, their electron orbitals begin to overlap. This overlap forms a molecular bond between the two atoms with its own molecular orbital shape.
To further demonstrate the consistency of the Lewis structures with M.O. theory, we will formalize a definition of bond order--the number of bonds between atoms in a molecule. The bond order is the difference in the number of electron pairs occupying an antibonding and a bonding molecular orbital. Because hydrogen has one electron pair in its bonding orbital and none in its antibonding orbital, molecular orbital theory predicts that H 2 has a bond order of one--the same result that is derived from Lewis structures.