Orbital Filling

There are a series of rules that are followed when placing electrons into orbitals to give the ground state (most stable) electron configuration of an atom.

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There are a few exceptions to the order of filling in the transition metals. I ask that you know two: chromium and copper. The reason that these are an exception is due the extra stability when a subshell is half-filled or filled. Since the energies of orbitals become closer together at higher n shells, it becomes more common to see irregularities to the filling pattern. Learn more in the video below.

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