Which of the following statements is true concerning the electron configuration [Kr]5p2? This configuration cannot be...

Which of the following statements is true concerning the electron configuration [Kr]5p2?

This configuration cannot be the ground-state electron configuration for a Sr atom because it violates the Heisenberg uncertainty principle.

This configuration cannot be the ground-state electron configuration for a Sr atom because it violates Hund's rule.

This configuration cannot be the ground-state electron configuration for a Sr atom because it violates the Pauli exclusion principle.

This configuration cannot be the ground-state electron configuration for a Sr atom because it violates the Aufbau principle.

This configuration is the ground-state electron configuration for a Sr atom.

Expert Solution

This configuration cannot be the ground-state electron configuration for a Sr atom because it violates the Aufbau principle. The above statement is correct . We know afbau principle states that in the ground state of an atom or an ion atoms fill atomic orbital of lowest free energy as they are more stable in nature thus configuration of an Sr atom is 5s2. S2 has less energy than p2 according to n+l rule.

queen_honey_blossom answered 2 years ago

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