The quantum numbers of six electrons are ...

NCERT Class XI Chemistry Structure of Atom Solutions

Question : 62 of 67

Marks: +1, -0

The quantum numbers of six electrons are given below. Arrange them in order of increasing energies. If any of these combination (s) has/have the same energy lists :

1. n = 4, l = 2,

m_l

= –2,

m_s

= –1/2 2. n = 3, l = 2,

m_l

= 1, ms = +1/2

3. n = 4, l = 1,

m_l

= 0,

m_s

= +1/2 4. n = 3, l = 2,

m_l

= –2, ms = –1/2

5. n = 3, l = 1,

m_l

= –1,

m_s

= +1/2 6. n = 4, l = 1,

m_l

= 0, ms = +1/2

Solution:

1. 4d (n + l = 4 + 2 = 6)

2. 3d (n + l = 3 + 2 = 5)

3. 4p (n + l = 4 + 1 = 5)

4. 3d (n + l = 3 + 2 = 5)

5. 3p (n + l = 3 + 1 = 4)

6. 4p (n + l = 4 + 1 = 5)

Greater the value of n + l, higher will be the energy of orbital. If two orbitals have same n + l value then the orbital having higher n value will possess higher energy.

Therefore, the required order is : 5 < 2 = 4 < 6 = 3 < 1

Go to Question:

Prev Question

Next Question