Element Name: Erbium
Atomic No.: 68
State (298 K): solid
Uses: IR glasses
Atomic Mass: 167.26 g/mol
Density: 9.07 g/cm
3
B.P.: 3136 K
F.P.: 1802 K
Electronic Configuration: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
4p
6
4d
10
4f
12
5s
2
5p
6
6s
2
Isotopes:
162
Er 161.9288 amu (0.14%)
164
Er 163.9293 amu (1.56%)
166
Er 165.9304 amu (33.4%)
p;
167
Er 166.9320 amu (22.9%)
168
Er 167.9324 amu (27.1%)
170
Er 169.9355 amu (14.9%)
Electronegativity: 1.24
Radius: 157 pm (covalent)
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