Problem page here is a sketch of the radial probability distribution of three orbitals: use this sketch to answer the following questions. what is the most likely distance from the nucleus for an electron in orbital a? note: your answer must be within 50 pm of the exact answer to be graded correct. list the orbitals in order of increasing energy: suppose all three orbitals were inner orbitals of an atom. in which orbital would an electron be most effective at screening the charge of the nucleus from the outer electrons?