An orbital consists a maximum of ............electrons.

Answer

**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 certain number of electrons.

2. **Pauli's Exclusion Principle**: This principle states that no two electrons in an atom can have the same set of four quantum numbers. This implies that an orbital can hold a maximum of two electrons.

3. **Example of S Subshell**: The S subshell has only one orbital. According to Pauli's exclusion principle, this single orbital can accommodate a maximum of two electrons.

4. **Conclusion**: Therefore, we conclude that an orbital consists of a maximum of 2 electrons.

**Final Answer**: An orbital consists of a maximum of 2 electrons.

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