NEET Chemistry
Lanthanum: electronic configuration and properties
Lanthanum has atomic number 57 and electronic configuration [Xe] 5d1 6s2. Explore its periodic behaviour and open the interactive atom model.
Open Lanthanum in 3DKey properties of Lanthanum
- Symbol
- La
- Atomic number
- 57
- Atomic mass
- 138.90547(7)
- Family
- lanthanoid
- Electronic configuration
- [Xe] 5d1 6s2
- Shell distribution
- 2, 8, 18, 18, 9, 2
- Oxidation states
- 2, 3
- Standard state
- solid
Periodic behaviour
Atomic radius: 169 pm. Electronegativity: 1.1. First ionisation energy: 538 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 Lanthanum.
Related lanthanoid elements
Frequently asked questions
What is the electronic configuration of Lanthanum?
Lanthanum has electronic configuration [Xe] 5d1 6s2, with shell distribution 2, 8, 18, 18, 9, 2.
What are the oxidation states of Lanthanum?
The listed oxidation states are 2, 3.
How can I view the Lanthanum atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.