I've actually started AS level Chemistry and I think I lack an understanding of this basic concept. This is what I know:- Orbitals are regions where there is high probability of finding an electron. 's' orbitals have a spherical shape and 'p' have a dumbbell one. But how do electrons move within the orbitals? Do electrons in the 's' orbitals move in a relatively 'circular' sort of motion or is it completely random within the orbital? What about the 'p' orbital? I do know that it has two "sections"(the two balloons) Does each section contain an electron each? and how does it move wthin the 'p' orbital? Just to be clear. I initially believed that electrons moved around nuclei just as planets move around the sun (rotation that is). But what is the concept of orbitals then? I know these are a lot of questions Please Register or Log in to view the hidden image! but any help or references are appreciated.