When there are two electron is the same orbitals , they have ……………spins

Options

A. Parallel
B. Symmetric
C. Antiparallel
D. None of these

Explanation

To answer the question, "When there are two electrons in the same orbitals, they have …………… spins," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Orbitals**: An orbital is a region in an atom where there is a high probability of finding electrons. Each orbital can hold a maximum of two electrons.

2. **Pauli's Exclusion Principle**: According to Pauli's exclusion principle, no two electrons in an atom can have the same set of four quantum numbers. This means that if two electrons occupy the same orbital, they must differ in at least one of their quantum numbers.

3. **Electron Spins**: Electrons are subatomic particles that have a property called "spin." Spin can be thought of as a form of angular momentum, and it can take one of two values: +1/2 (often referred to as "spin up") or -1/2 (often referred to as "spin down").

4. **Opposite Spins in the Same Orbital**: When two electrons occupy the same orbital, they must have opposite spins to comply with the Pauli exclusion principle. This means that if one electron has a spin of +1/2, the other must have a spin of -1/2.

5. **Conclusion**: Therefore, when there are two electrons in the same orbital, they have **anti-parallel spins**.

### Final Answer:
When there are two electrons in the same orbitals, they have **anti-parallel spins**.

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