Question

Maximum two electrons can be associated with quantum numbers, $n=3,l=1$ and $m=-1$ in an atom. The above statement is in accordance with:

• A. Pauli's exclusion principle
• B. $(n+l)$ rule
• C. Hund's maximum spin multiplicity rule
• D. Aufbau principle

Answer 1

The correct option is A Pauli's exclusion principle

Pauli's exclusion principle states that,

"Two electrons in an atom cannot have the same set of all four quantum numbers" Or "Only two electrons may exist in the same orital with three quantum numbers same i.e. the fourth quantum number different and these electrons must have opposite spin"