Molecular orbital. In other words, notice that the one s is lower in energy than the SP because the one s has more s character than the SP does. And so when they interact, they form two types of molecular orbitals bonding and the antibonding molecular orbitals. So since this is higher in energy, electrons will not be found in this rather destabilizing molecular orbital. So let's look at the SP and SP interaction. So when the carbon and the carbon interact to form our bond, our sigma bond, we have an SP interaction within the atomic orbitals to form our molecular orbitals.