Quantum Mechanical Model Of Atom

The electronic configuration of potassium (At. no. 19) is:

1%7B%7Bs%7D%5E%7B2%7D%7D%2C2%7B%7Bs%7D%5E%7B2%7D%7D2%7B%7Bp%7D%5E%7B6%7D%7D%2C3%7B%7Bs%7D%5E%7B2%7D%7D3%7B%7Bp%7D%5E%7B6%7D%7D%2C4%7B%7Bs%7D%5E%7B1%7D%7D

The valence electron is present in

4%7B%7Bs%7D%5E%7B1%7D%7D.

Hence, quantum numbers for

4%7B%7Bs%7D%5E%7B1%7D%7D

are : n (Principal quantum no.) = 4

l

(Azimuthal quantum no.) = 0 Note: for s sub shell

l%3D0

for p sub shell

l%3D1

for d sub shell

l%3D2

for

f

sub shell

l%3D3

m (magnetic quantum no.) = 0 The value of m depends upon

l.

s (spin quantum no.)

%3D%2B%5Cfrac%7B1%7D%7B2%7D.

Chapter Questions
1 MCQs