When Are Orbitals Most Stable?

An atom is most stable (and therefore unreactive) when all its orbitals are full. The most stable configurations are the ones that have full energy levels.

Which orbitals most stable?

Explanation: Half-filled and fully filled orbitals are most stable.

What makes an orbital more stable?

The orbitals in which the sub-shell is exactly half-filled or completely filled are more stable because of the symmetrical distribution of electrons. Exchange energy: The electrons which are there in degenerate orbitals have a parallel spin and tend to exchange their position. ... Therefore, its stability is maximum.