Question

What are the values of quantum numbers (n,l ,m and s) for the valence electron in sodium atom?

Answer 1

===> The Principal quantum number " n " :-

values of ◆◆◆ n ◆◆◆1 , 2 , 3 , 4 ..........

when n value increases the shells become larger and the electrons in those shells are farther from the nucleus.

===> The angular - momentum quantum number " l " :-

values of ◆◆◆ l ◆◆◆ 0 , 1 , 2 , 3 ......

Each value of ' l ' for a particular sub-shell is generally designed by the letters :- s , p , d.....


===> The magnetic quantum number " ml " :-

values of ◆◆◆ ml ◆◆◆ -l , ( -l +1 ) ..., -1 , 0 , 1 ,.... ( +l -1 ) , +l


The magnetic quantum number has integer values between -l and l including zero.
For a certain value of l , there are ( 2l + 1 ) integer values of ml

===> The spin quantum number " ms " :-

values of ◆◆◆ ms ◆◆◆ + 1/2 and - 1/2

The 3 quantum numbers n , l and ml describe the size 【 energy 】 , shape and orientation , respectively of an atomic orbital in space.

The importance of spin quantum number is seen when electrons occupy specific orbitals in multi - electron atoms .