![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? :
![3d render of atom structure of palladium isolated over white background Protons are represented as red spheres, neutron as yellow spheres, electrons a Stock Photo - Alamy 3d render of atom structure of palladium isolated over white background Protons are represented as red spheres, neutron as yellow spheres, electrons a Stock Photo - Alamy](https://c8.alamy.com/comp/RN8NK3/3d-render-of-atom-structure-of-palladium-isolated-over-white-background-protons-are-represented-as-red-spheres-neutron-as-yellow-spheres-electrons-a-RN8NK3.jpg)
3d render of atom structure of palladium isolated over white background Protons are represented as red spheres, neutron as yellow spheres, electrons a Stock Photo - 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)
Pd Palladium Element Information: Facts, Properties, Trends, Uses and comparison - Periodic Table of the Elements | SchoolMyKids
![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.jpg?ver=6)