NEET Chemistry
Iron: electronic configuration and properties
Iron has atomic number 26 and electronic configuration [Ar] 3d6 4s2. Explore its periodic behaviour and open the interactive atom model.
Open Iron in 3DKey properties of Iron
- Symbol
- Fe
- Atomic number
- 26
- Atomic mass
- 55.845(2)
- Family
- transition metal
- Electronic configuration
- [Ar] 3d6 4s2
- Shell distribution
- 2, 8, 14, 2
- Oxidation states
- -2, -1, 1, 2, 3, 4, 5, 6
- Standard state
- solid
Periodic behaviour
Atomic radius: 125 pm. Electronegativity: 1.83. First ionisation energy: 763 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 Iron.
Related transition metal elements
Frequently asked questions
What is the electronic configuration of Iron?
Iron has electronic configuration [Ar] 3d6 4s2, with shell distribution 2, 8, 14, 2.
What are the oxidation states of Iron?
The listed oxidation states are -2, -1, 1, 2, 3, 4, 5, 6.
How can I view the Iron atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.