Problem: 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.[Xe]6s25d4

FREE Expert Solution

We’re being asked to indicate which of Pauli exclusion principle and Aufbau principle is violated in [Xe]6s25d4:


Recall that:


  • Pauli exclusion principle 
    • States that no two (2) electrons can have the same set of four (4) quantum numbers
    • it cannot have the same spin quantum number, m→ must have opposite spins
  • Aufbau principle 
    • States that orbitals must be filled in order of increasing energy 
      • totally fill lowest energy orbital first


Before we can do that, we have to determine the element corresponding to the given noble gas/ condensed electron configuration.


Recall that we can shorten the electron configuration by including the nearest noble gas


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Problem Details

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.

[Xe]6s25d4

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