68
167.259 u
Er
Erbium
Lanthanide
Atomic Structure
Physical State
Group
N/A
Period
6
Block
f
Electron Configuration
[Xe] 4f¹² 6s²
Physical Properties
Atomic Mass:
167.259 u
Electronegativity:
1.24
Atomic Radius:
226 pm
Ionization Energy:
6.108 eV
Density:
9.066 g/cm³
Melting Point:
1802 K
Boiling Point:
3141 K
Historical Information
Discovered By:
Carl Gustaf Mosander
Year Discovered:
1843