Question

The quantum numbers of four electrons are given below. Arrange them

in order of increasing energies :

a) n = 4, l = 2, m = -2, s = +1/2

b) n = 3, l = 2, m = -1, s = +1/2

c) n = 4, l = 0, m = 0, s = +1/2

d) n = 3, l = 1, m = -2, s = +1/2​

Answer 1

A᭄ɴsᴡᴇʀ࿐

1. The quantum numbers n=4,l=2,m

1

=−2,m

s

=−1/2 represents 4d orbital.

2. The quantum numbersn=3,l=2,m

1

=1,m

s

=+1/2 represents 3d orbital.

3. The quantum numbersn=4,l=1,m

1

=0,m

s

=+1/2 represents 4p orbital.

4. The quantum numbersn=3,l=2,m

1

=−2,m

s

=−1/2 represents 3d orbital.

5. The quantum numbersn=3,l=1,m

1

=−1,m

s

=+1/2 represents 3p orbital.

6. The quantum numbersn=4,l=1,m

1

=0,m

s

=+1/2 represents 4p orbital.

The order of increasing energies is (v)<(ii)=(iv)<(vi)=(iii)<(i).