Maximum number of electrons in a subshell of an atom can be determined by which of the following formula:

Question

Accepted Answer

The capacity of a subshell to hold electrons is determined by the azimuthal quantum number ($l$).

1.  **Number of Orbitals:** The number of orbitals in a given subshell is given by the formula $(2l + 1)$.
2.  **Electrons per Orbital:** According to the Pauli Exclusion Principle, each orbital can accommodate a maximum of **2 electrons** with opposite spins.
3.  **Calculation:** 
    $$ 	ext{Max Electrons} = 2 	imes (	ext{Number of Orbitals}) $$
    $$ 	ext{Max Electrons} = 2 	imes (2l + 1) = 4l + 2 $$

**Evidence from Sources:**
*   **d-subshell ($l=2$):** Source  confirms the $d$ subshell holds up to 10 electrons ($4(2) + 2 = 10$).
*   **f-subshell ($l=3$):** Source  and  confirm the $f$ subshell holds up to 14 electrons ($4(3) + 2 = 14$).

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