Protactinium: electronic configuration and properties
Protactinium has atomic number 91 and electronic configuration [Rn] 5f2 6d1 7s2. Explore its periodic behaviour and open the interactive atom model.
Open Protactinium in 3DKey properties of Protactinium
- Symbol
- Pa
- Atomic number
- 91
- Atomic mass
- 231.03588(2)
- Family
- actinoid
- Electronic configuration
- [Rn] 5f2 6d1 7s2
- Shell distribution
- 2, 8, 18, 32, 20, 9, 2
- Oxidation states
- 3, 4, 5
- Standard state
- solid
Periodic behaviour
Atomic radius: not experimentally determined. Electronegativity: 1.5. First ionisation energy: 568 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 Protactinium.
Related actinoid elements
Frequently asked questions
What is the electronic configuration of Protactinium?
Protactinium has electronic configuration [Rn] 5f2 6d1 7s2, with shell distribution 2, 8, 18, 32, 20, 9, 2.
What are the oxidation states of Protactinium?
The listed oxidation states are 3, 4, 5.
How can I view the Protactinium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.