Question

The correct order of relative stability of half-filled and completely filled sub-shell is:

• A. $p^3>d^5<d^{10}<p^6$
• B. $d^5>p^3<d^{10}<p^6$
• C. $d^5<p^3<d^{10}<p^6$
• D. $p^3>d^{10}<d^5<p^6$

Answer 1

The correct option is C $d^5<p^3<d^{10}<p^6$

Fully filled $p$-orbitals and half-filled $p$-orbitals are more stable than fully filled and half-filled $d$-orbitals.

The order is: $d^5<p^3<d^{10}<p^6$