Question

Write 4 quantum numbers for 2s,2p,3d,4f electrons ?

Answer 1

The four quantum numbers are given as follows -

(i) Principal quantum number - This quantum number denotes the principle electron shells that the electron occupies. The number written in front of these shells represents the principal quantum number.

(ii)Azimuthal quantum number - It describes the shape of a given orbital and is denoted by the symbol 'l'. Its value is n-1. Every orbital has a specific value of 'l'. For s orbital, its value is zero.

(iii)Magnetic quantum number - It describes the orientation of a given orbital of particular energy in space and is denoted by the symbol 'm'. Its value lies in between -l to +l.

(iv) Spin quantum number - It describes the spin of an electron and is denoted by symbol 's'. Its value is always $\pm \frac{1}{2}$ .

2s : n=2 L=0,m=0 s=$\pm \frac{1}{2}$
2p : n=2,l=1, m=-1,0,1 , s=$\pm \frac{1}{2}$
3d : n=3,l=2,m=-2,-1,0,1,2, , s=$\pm \frac{1}{2}$
4f : n=4,l=3,m=-3,-2,-1,0,1,2,3, s=$\pm \frac{1}{2}$