How many peaks (humps) will be noticed in the radial probability graph of the 4s orbital?

Explanation

To determine how many peaks (humps) will be noticed in the radial probability graph of the 4s orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number (n)**:
- The principal quantum number for the 4s orbital is \( n = 4 \).

2. **Determine the Azimuthal Quantum Number (l)**:
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