Element Name: Thulium
Atomic No.: 69
State (298 K): solid
Uses: radiation source
Atomic Mass: 168.93 g/mol
Density: 9.32 g/cm
3
B.P.: 2220 K
F.P.: 1818 K
Electronic Configuration: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
4p
6
4d
10
4f
13
5s
2
5p
6
6s
2
Isotopes:
169
Tm 168.93 amu (100.0%)
Electronegativity: 1.25
Radius: 156 pm (covalent)
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