Question

How does the Pauli exclusion principle affect orbital filling? Give an example of a 2p orbital diagram for which Paul Exclusion principle is violated.

Answer 1

Pauli's exclusion principle states that no two subshells of same element have same 4 quantum numbers.

Take example of Berrilim orbital

Electronic configuration is given by 1s²2s²

But the orbital is

`\\ \rm\Rrightarrow \huge{\boxed{\uparrow\downarrow}}\:\:\huge{\boxed{\uparrow\downarrow\mid\:\:\:\:\mid\:\:\:}}`