How would you find the quantum numbers for an atom?
Quantum numbers are considered as the coordinates that will give an idea about the location of an electron in an atom.
There are four different quantum numbers:
- Principal Quantum Number (n) has integral values 1, 2, 3, ... This number determines the size and energy of the orbital.
Angular Momentum Quantum Number (
#l#) associated with the number of different types of subshells in an energy level. #l=0, 1, 2, 3, ... (n - 1)#.
Magnetic Quantum Number (
#m_l#) describes the orientation (direction) in space of each orbital and can have integral values from #- l#through #+l#.
- Electron Spin Quantum Number (
#m_s#) describes the direction of spin of the electron(s) in an orbital. There are only two values of #m_s, +1/2 "and" -1/2#.
Note that no two electrons may have identical sets of all 4 quantum numbers.
Consider the electron configuration of sodium
What would be the set of quantum numbers of the valence electron of sodium: