Electron configuration exceptions

[Daniela Santana 2L]

Does anyone have a way of remembering the electron configurations exceptions for the elements in the d-block that don't follow the regular method of filling subshells?

[Simrah_Ahmed1J]

For me, I always remember it by the fact that the d orbitals would prefer to have a half full or a completely full orbital for more stability, so that's why when it comes to Cr there is an exception because it is one away from a half full 3d orbital so it 'steals' one electron from the 4s orbital, making the configuration [Ar] 3d⁵ 4s¹. Also then, when it comes to Cu it is also an exception because it is 1 away from a full 3d orbital so it 'steals' one electron from the 4s orbital, making the configuration [Ar] 3d¹⁰4s¹.