Write the correct electronic configuration of Pd,Ag,Pt&Au. I think for (Pd)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^0 4d^10 (Ag)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1 4d^10 (Pt)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^1 5d^9 4f^14 (Au)=1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^1 5d^10 4f^14. Explain each if they do not obey the Aufbau principle. I think they do not obey the Aufbau principle but I don't know why? Please help!
Click on this link, click on the element, then scroll down to electron shell properties. There you will find the electron configuration for the element.
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To determine if the electronic configurations of Pd, Ag, Pt, and Au obey the Aufbau principle, let's first understand what the Aufbau principle states.
The Aufbau principle is a rule in quantum mechanics that states that electrons occupy the lowest energy orbitals available before filling higher-energy ones. This means that electrons will fill orbitals in a specific order based on their increasing energy levels.
Now, let's analyze the electronic configurations you provided:
1. Palladium (Pd):
- The electronic configuration you provided is correct: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^0 4d^10.
- Pd does not obey the Aufbau principle because it has an electron configuration of 5s^0 before 4d^10. According to the Aufbau principle, the 5s orbital should be filled after the 4d orbital.
2. Silver (Ag):
- The electronic configuration you provided is correct: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1 4d^10.
- Ag also does not follow the Aufbau principle because it has an electron configuration of 5s^1 before 4d^10.
3. Platinum (Pt):
- The electronic configuration you provided is correct: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^1 5d^9 4f^14.
- Pt, like the previous two elements, does not strictly follow the Aufbau principle. It has an electron configuration of 6s^1 before filling the 5d^9 subshell.
4. Gold (Au):
- The electronic configuration you provided is correct: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^1 5d^10 4f^14.
- Similarly, Au's electron configuration of 6s^1 before 5d^10 does not follow the Aufbau principle.
In summary, Pd, Ag, Pt, and Au do not strictly obey the Aufbau principle because they have some electron configurations where higher-energy orbitals are filled before lower-energy ones. This phenomenon occurs due to the relative energies of the orbitals involved and influences by electron-electron repulsions and other factors.