Which quantum number is not related with Schrodinger equation :-

Options

A. n
B. l
C. m
D. s

Explanation

To determine which quantum number is not related to the Schrödinger equation, we need to understand the different quantum numbers and their significance in quantum mechanics.

### Step-by-Step Solution:

1. **Understanding Quantum Numbers**:
- Quantum numbers are used to describe the properties of atomic orbitals and the electrons in those orbitals.
- There are four quantum numbers:
- Principal quantum number (n)
- Azimuthal quantum number (l)
- Magnetic quantum number (m)
- Spin quantum number (s)

2. **Role of Schrödinger Equation**:
- The Schrödinger equation is fundamental in quantum mechanics and is used to find the allowed energy levels of quantum systems.
- It provides solutions that correspond to the principal quantum number (n), azimuthal quantum number (l), and magnetic quantum number (m).
- These quantum numbers describe the size, shape, and orientation of orbitals.

3. **Identifying the Quantum Numbers**:
- **Principal Quantum Number (n)**: Indicates the energy level and size of the orbital.
- **Azimuthal Quantum Number (l)**: Describes the shape of the orbital (s, p, d, f).
- **Magnetic Quantum Number (m)**: Specifies the orientation of the orbital in space.

4. **Spin Quantum Number (s)**:
- The spin quantum number (s) describes the intrinsic spin of the electron, which can be either +1/2 or -1/2.
- It does not arise from the Schrödinger equation itself but is an additional property of electrons.

5. **Conclusion**:
- Since the Schrödinger equation does not account for the spin quantum number, the answer to the question is that the quantum number not related to the Schrödinger equation is the **spin quantum number (s)**.

### Final Answer:
The quantum number that is not related to the Schrödinger equation is the **spin quantum number (s)**.

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