Why are 2d and 3f orbitals not possible ?

Explanation

To understand why 2D and 3F orbitals are not possible, we need to consider the definitions and relationships between the principal quantum number (N) and the azimuthal quantum number (L).

### Step-by-Step Solution:

1. **Understanding Quantum Numbers**:
- The principal quantum number (N) indicates the main energy level or shell of an electron in an atom. It can take positive integer values: N = 1, 2, 3, etc.
- The azimuthal quantum number (L) defines the shape of the orbital and can take integer values from 0 to (N-1). This means that for a given N, L can be 0, 1, 2, ..., up to (N-1).

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