Google "Electron Orbitals". All the spaces there are all the possible highest likely locations for the electrons. Good Introduction to some Quantum Mechanics 👍
Except they only look like that if there is an external reference system imposing some structure on the atom!
Otherwise all orbitals are basically spherical because they can all just be in a superposition of all possible orbitals and we couldn't tell a difference...
And then suddenly you have two atoms meeting and need to explain why 1+1=0 for their molecular orbits -.-
I don't think so. Orbitals give you the spaces of highest probability! Electrons could be outside as well. And since it is based on probability it is definitely a useful model.
Electronic orbitals are regions within the atom in which electrons have the highest probability of being found.
I'll have a look at this later, I remember it being any possible existence of an election, not just highest probabilities, from when I was taught this several weeks ago.