Monster name: Erby
Erbium
- Atomic number
- 68
- Symbol
- Er
- Series
- lanthanides
- Group
- La
- Period
- 6
- State of matter
- solid
- rare earth elements
Erbium is named after the swedish find spot Ytterby, just like Yttrium, Terbium and Ytterbium. Apparently the chemists of that time were not very creative in naming.
Therefore Erby is the third monster of the Ytterbies.
