Been cataloguing some of my elements sub-collection today. I have added the following (left to right, top to bottom):
- Erbium, Yttrium, Hafnium, Dysprosium, and Ytterbium
- Gadolinium, Samarium, Holmium, Lutetium, and Scandium
You can click on the Periodic Table elements in the link below to go to the individual entries…
