Question

The Pauli exclusion principle states that:

Answer 1

Pauli exclusion principle

• No two electrons in an atom can have the same set of four quantum numbers.
• Pauli's exclusion principle can also be stated as: “Only two electrons may exist in the same orbital and these electrons must have opposite spin.”

Example

• Subshell 1s only have one orbital, the maximum number of electrons in the subshell can be two.
• In p and d subshells, the maximum number of electrons can be $6$ and $10$.