68
Er
Erbium
Erbium
Erbium (Er)
Lanthanides · Solid · Period 6 · Group 3
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Element Properties
- Atomic Number
- 68
- Symbol
- Er
- Atomic Mass
- 167.26
- Category
- Lanthanides
- Standard State
- Solid
- Period
- 6
- Group
- 3
- Electronegativity
- 1.24
- Atomic Radius
- 235
- Ionization Energy
- 6.11
- Electron Affinity
- —
- Oxidation States
- +3
- Melting Point
- 1802 K (1528.85 °C)
- Boiling Point
- 3141 K (2867.85 °C)
- Density
- 9.07
- Electron Configuration
- [Xe]6s2 4f12
- Year Discovered
- 1843
Frequently asked questions
What is the atomic number of Erbium?
The atomic number of Erbium is 68, which equals the number of protons in its nucleus.
What is the atomic mass of Erbium?
The atomic mass of Erbium is approximately 167.26 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Erbium?
The electron configuration of Erbium is [Xe]6s2 4f12.
Where is Erbium in the periodic table?
Erbium is located in period 6, group 3.
When was Erbium discovered?
Erbium was discovered in 1843.
Related elements
Same group
21
Sc
Scandium
44.956
39
Y
Yttrium
88.906
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.24