![ELI5: How is Palladium able to cram all its electrons into it's first 4 valence shells, but the elements both above AND below it are forced to use their 5th shell? : ELI5: How is Palladium able to cram all its electrons into it's first 4 valence shells, but the elements both above AND below it are forced to use their 5th shell? :](https://external-preview.redd.it/7wPcIZfACSejBLD7haCQxLkUsmlxts3gJscWRY2vMWw.jpg?auto=webp&s=073e556447856ed98ab0c80f0fad358979ffcb47)
ELI5: How is Palladium able to cram all its electrons into it's first 4 valence shells, but the elements both above AND below it are forced to use their 5th shell? :
![Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids](https://www.schoolmykids.com/static/images/ptable/electron_configuration_palladium.png)
Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids
![Pd Palladium, Periodic Table of the Elements, Shell Structure of Palladium - Electrons per energy level Stock Vector Image & Art - Alamy Pd Palladium, Periodic Table of the Elements, Shell Structure of Palladium - Electrons per energy level Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/2MD25GY/pd-palladium-periodic-table-of-the-elements-shell-structure-of-palladium-electrons-per-energy-level-2MD25GY.jpg)
Pd Palladium, Periodic Table of the Elements, Shell Structure of Palladium - Electrons per energy level Stock Vector Image & Art - Alamy
![Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids](https://www.schoolmykids.com/tools/static/images/shells/shells_Pd.png)