Thulium

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Thulium
Tm
In situ availability:
Necessity:
Atomic number: 69
Atomic mass: 168.93421
group: 19
period: N/A
normal phase: Solid
series: Lanthanide
density: 9.32 g/cm3
melting point: 1818K,
1545°C,
2813°F
boiling point: 2223K,
1950°C,
3542°F
SrYZr
Er ← Tm → Yb
FmMdNo
Atomic radius (pm): 175
Bohr radius (pm): 222
Covalent radius (pm):
Van der Waals radius (pm):
ionic radius (pm): (+3)109
1st ion potential (eV): 6.18
Electron Configuration
1s2
2s2 2p6
3s2 3p6 3d10
4s2 4p6 4d10 4f13
5s2 5p6
6s2
Electrons Per Shell
2, 8, 18, 31, 8, 2
Electronegativity: 1.25
Electron Affinity: -
Oxidation states: 3, 2
Magnetism: ?
Crystal structure: Hexagonal

Thulium is a Lanthanide metal. It has a Hexagonal crystalline structure. This element has a stable isotope of 169




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