Match List-I with List-II:

**List-I (Quantum Number)**
(A) $m_l$
(B) $m_s$
(C) $l$
(D) $n$

**List-II (Inform

Question

Match List-I with List-II:

**List-I (Quantum Number)**
(A) $m_l$
(B) $m_s$
(C) $l$
(D) $n$

**List-II (Information provided)**
(I) Shape of the orbital
(II) Size of the orbital
(III) Orientation of the orbital
(IV) Orientation of spin of the electron

Choose the correct answer from the options given below:

Accepted Answer

According to the NCERT text on Quantum Numbers:
1.  **Principal quantum number ($n$):** Determines the size and to a large extent the energy of the orbital . (Matches II)
2.  **Azimuthal quantum number ($l$):** Also known as orbital angular momentum, it defines the three-dimensional shape of the orbital . (Matches I)
3.  **Magnetic orbital quantum number ($m_l$):** Gives information about the spatial orientation of the orbital with respect to a standard set of coordinate axes . (Matches III)
4.  **Electron spin quantum number ($m_s$):** Refers to the orientation of the spin of the electron . (Matches IV)

Therefore, the correct matching is A-III, B-IV, C-I, D-II.

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