Now, before these atoms can combine to form, our BH three molecule hybridization of boron must take place. The question is, how many hybrid orbitals should boron form before this molecule can be created? The answer lies in this molecule itself. How many times does boron bond two H? Well, since there's one boron and three H atoms, that means there are three different orbitals. So that means we must develop three hybrid orbitals.