Give the physical significance of all quantum numbers.
Significance of quantum numbers:
(i) Principal quantum number (n): It signifies the size of the electron cloud. It can have values 1, 2, 3, 4.....etc.
(ii) Azimuthal quantum number (l): It signifies the shape of electron cloud. It can have values from l = 0 to l = n - 1.
(iii) Magnetic quantum number (m): It signifies the orientation of electron cloud. It can have values from - l to + l including zero.
(iv) Spin quantum number (s): It signifies the spin of the electrons can have values 1/2 for each value of m.