Thulium: electronic configuration and properties
Thulium has atomic number 69 and electronic configuration [Xe] 4f13 6s2. Explore its periodic behaviour and open the interactive atom model.
Open Thulium in 3DKey properties of Thulium
- Symbol
- Tm
- Atomic number
- 69
- Atomic mass
- 168.93421(2)
- Family
- lanthanoid
- Electronic configuration
- [Xe] 4f13 6s2
- Shell distribution
- 2, 8, 18, 31, 8, 2
- Oxidation states
- 2, 3
- Standard state
- solid
Periodic behaviour
Atomic radius: not experimentally determined. Electronegativity: 1.25. First ionisation energy: 597 kJ/mol. Use these values comparatively across a period or group rather than memorising them in isolation.
NEET exam focus
For NEET, prioritise the NCERT electronic configuration, periodic position, common oxidation states, and direct trend-based comparisons involving Thulium.
Related lanthanoid elements
Frequently asked questions
What is the electronic configuration of Thulium?
Thulium has electronic configuration [Xe] 4f13 6s2, with shell distribution 2, 8, 18, 31, 8, 2.
What are the oxidation states of Thulium?
The listed oxidation states are 2, 3.
How can I view the Thulium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.