We have to determine whether the Pauli exclusion principle or the Aufbau principle in violated in the given electron configuration.
The rules for electron configuration are:
This rule states that electrons in a ground state atom fill up the lower energy orbitals before they start filling higher energy orbitals.
The following do not represent valid ground-state electron configurations for an atom either because they violate the Pauli exclusion principle or because orbitals are not filled in order of increasing energy. Indicate which of these two principles is violated in each example.
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