How many electron states are there in a shell defined by the quantum number `n=6`?

Explanation

To determine how many electron states are there in a shell defined by the quantum number \( n = 6 \), we can use the formula for the maximum number of electrons in a shell, which is given by:

\[ \text{Number of electrons} = 2n^2 \]

### Step-by-Step Solution:

...