And this is the one s orbital of our HB atom. So when these orbitals atomic orbitals are very far apart, nothing really happens. But as I move them closer and closer, eventually, when I get to this point, these atomic orbitals will overlap, and they will create something known as the molecular orbital or molecular bonding orbital. Now, this guy is represented by PSI phi. So phi bonding is our molecular orbital. So when we see this symbol, we usually think atomic orbitals.