And we'll see why it's called antibonding in just a second. The first thing you have to notice about this antibody molecular orbital. If that is higher in energy than either of these guys, So let's move to this diagram here. So here we have the combination of two of these atomic orbitals to form our fine bonding molecular orbital. Now, notice the following this positive and negative sign designates the sign of the Orbitals. And Orbitals are simply wave functions.