Neptunium: electronic configuration and properties
Neptunium has atomic number 93 and electronic configuration [Rn] 5f4 6d1 7s2. Explore its periodic behaviour and open the interactive atom model.
Open Neptunium in 3DKey properties of Neptunium
- Symbol
- Np
- Atomic number
- 93
- Atomic mass
- 237
- Family
- actinoid
- Electronic configuration
- [Rn] 5f4 6d1 7s2
- Shell distribution
- 2, 8, 18, 32, 22, 9, 2
- Oxidation states
- 3, 4, 5, 6, 7
- Standard state
- solid
Periodic behaviour
Atomic radius: not experimentally determined. Electronegativity: 1.36. First ionisation energy: 605 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 Neptunium.
Related actinoid elements
Frequently asked questions
What is the electronic configuration of Neptunium?
Neptunium has electronic configuration [Rn] 5f4 6d1 7s2, with shell distribution 2, 8, 18, 32, 22, 9, 2.
What are the oxidation states of Neptunium?
The listed oxidation states are 3, 4, 5, 6, 7.
How can I view the Neptunium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.