question_answer

Which of the four quantum numbers\[(n,\,l,\,{{m}_{l}},\,{{m}_{s}})\]  determine (a) the energy of an electron in a hydrogen atom and in a many electron atom (b) the size of an orbital (c) the shape of an orbital (d) the orientation of an orbital in space?

Answer:

                (a) Energy of electron in hydrogen atom is determined by \[n\] and in a many electron atom by \[n\] and \[l\]. (b) Size of the orbital is determined by \[n\]. (c) Shape of the orbital is determined by \[l\]. (d) Orientation of the orbital is determined by\[{{m}_{l}}\].