![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? :
![Palladium atomic structure has atomic number, atomic mass, electron configuration and energy levels. Stock Vector | Adobe Stock Palladium atomic structure has atomic number, atomic mass, electron configuration and energy levels. Stock Vector | Adobe Stock](https://as2.ftcdn.net/v2/jpg/04/16/00/17/1000_F_416001742_2LaJVduKLdPzN5azv5iCxnb13aGkss4k.jpg)
Palladium atomic structure has atomic number, atomic mass, electron configuration and energy levels. Stock Vector | Adobe Stock
![3d Render Of Atom Structure Of Palladium Isolated Over White Background Protons Are Represented As Red Spheres, Neutron As Yellow Spheres, Electrons As Blue Spheres Stock Photo, Picture And Royalty Free Image. 3d Render Of Atom Structure Of Palladium Isolated Over White Background Protons Are Represented As Red Spheres, Neutron As Yellow Spheres, Electrons As Blue Spheres Stock Photo, Picture And Royalty Free Image.](https://us.123rf.com/450wm/oorka/oorka1902/oorka190200039/118018673-3d-render-of-atom-structure-of-palladium-isolated-over-white-background-protons-are-represented-as-r.jpg)