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The electronic configuration of valence shell of Cu is 3d104s1 and not 3d94s2. How is this configuration explained?

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प्रश्न

The electronic configuration of valence shell of Cu is 3d104s1 and not 3d94s2. How is this configuration explained?

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उत्तर

Configuration with completely filled and half-filled orbitals have extra stability. In 3d104s1, d-orbitals are completely filled and s-orbital is half-filled. Hence, it is a more stable configuration.

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पाठ 2: Structure of Atom - Multiple Choice Questions (Type - I) [पृष्ठ १९]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
पाठ 2 Structure of Atom
Multiple Choice Questions (Type - I) | Q 31 | पृष्ठ १९

संबंधित प्रश्‍न

Choose the correct option.

p-orbitals are _________ in shape.


State Hund’s rule of maximum multiplicity with a suitable example.


State the order of filling atomic orbitals following Aufbau principle.


Write orbital notations for the electron in orbitals with the following quantum numbers.

n = 3, l = 2


Write electronic configurations of \[\ce{Fe, Fe2+, Fe3+}\].


Write condensed orbital notation of electronic configuration of the following element:

Carbon (Z = 6)


Write condensed orbital notation of electronic configuration of the following element:

Chlorine (Z = 17)


Write condensed orbital notation of electronic configuration of the following element:

Calcium (Z = 20)


If n = 3, what are the quantum number l and m?


The designation of a subshell with n = 6 and l = 2 is ____________.


Which one of the following is NOT possible?


Which of the following properties of atom could be explained correctly by Thomson Model of atom?


Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals:

(i)  (a) `n = 3, l = 2, m_l = -2, m_s = - 1/2`
  (b) `n = 3, l = 2, m_l = -1, m_s = - 1/2`
   
(ii)  (a) `n = 3, l = 1, m_l = 1, m_s = + 1/2`
  (b) `n = 3, l = 2, m_l = 1, m_s = + 1/2`
   
(iii) (a) `n = 4, l = 1, m_l = 1, m_s = + 1/2`
  (b) `n = 3, l = 2, m_l = 1, m_s = + 1/2`
   
(iv)  (a) `n = 3, l = 2, m_l = +2, m_s = - 1/2`
  (b) `n = 3, l = 2, m_l = +2, m_s = + 1/2`

Which of the following orbitals are degenerate?

3dxy, 4dxy 3dz2, 3dyz, 4dyz, 4dz2  


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, solve the questions given below:

Which of the following orbitals has the lowest energy?

5p, 5d, 5f, 6s, 6p


What is the difference between the terms orbit and orbital?


Which of the following is the correct plot for the probability density ψ2 (r) as a function of distance 'r' of the electron from the nucleus for 2s orbitals?


In the case of R, S configuration the group having the highest priority is ______.


What are the possible values of magnetic quantum number for p orbital?


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