| Element (Atom) Name | Erbium |
| Symbol | Er |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Lanthanide |
| Period Number (Periodic table) | 6 |
| Group number (Periodic table) | None |
| Atomic number | 68 |
| Atomic weight | 167.259 (Ref: Jlab-ele068, ciaaw-erbium, Nist-68) 167.3 (Ref: Lanl-68) |
| Atomic Radius | 235 pm (Van der Waals) |
| Density | 9.07 g/cm3 (Ref: Jlab-ele068) |
| Melting point | 1529°C (Ref: Jlab-ele068, Lanl-68) |
| Boiling point | 2868°C (Ref: Jlab-ele068, Lanl-68) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f12 5s2 5p6 6s2 |
| Oxidation States | +3 (Ref: Jlab-ele068) 3, 2, 1 (a basic oxide) (Ref: Lanl-68) |
| Ionization Energy | 6.108 eV (Ref: Jlab-ele068) 6.1077 eV (Ref: Nist-68) |
| Number of Stable Isotopes | 6 |
| InChI | InChI=1S/Er (Ref: Pubchem-68) |
| InChI Key | UYAHIZSMUZPPFV-UHFFFAOYSA-N (Ref: Pubchem-68) |
| Remarks |
REFERENCES
- Jlab-ele068: https://education.jlab.org/itselemental/ele068.html
- Lanl-68: https://periodic.lanl.gov/68.shtml
- ciaaw-erbium : https://www.ciaaw.org/erbium.htm
- Nist-68: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=68
- Pubchem-68: https://pubchem.ncbi.nlm.nih.gov/element/68
- science.co.il: https://www.science.co.il/elements/
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