The number of orbitals in a quantum shell is equal to ……………..

Explanation

To determine the number of orbitals in a quantum shell, we can follow these steps:

### Step 1: Understand Quantum Shells
A quantum shell is defined by the principal quantum number \( n \). Each shell can contain one or more subshells, which are defined by the azimuthal quantum number \( l \).

### Step 2: Determine the Values of \( l \)
The azimuthal quantum number \( l \) can take values from \( 0 \) to \( n-1 \). Therefore, for a given principal quantum number \( n \):
- For \( n = 1 \), \( l = 0 \)
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