NEET Chemistry
Selenium: electronic configuration and properties
Selenium has atomic number 34 and electronic configuration [Ar] 3d10 4s2 4p4. Explore its periodic behaviour and open the interactive atom model.
Open Selenium in 3DKey properties of Selenium
- Symbol
- Se
- Atomic number
- 34
- Atomic mass
- 78.96(3)
- Family
- nonmetal
- Electronic configuration
- [Ar] 3d10 4s2 4p4
- Shell distribution
- 2, 8, 18, 6
- Oxidation states
- -2, 2, 4, 6
- Standard state
- solid
Periodic behaviour
Atomic radius: 116 pm. Electronegativity: 2.55. First ionisation energy: 941 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 Selenium.
Related nonmetal elements
Frequently asked questions
What is the electronic configuration of Selenium?
Selenium has electronic configuration [Ar] 3d10 4s2 4p4, with shell distribution 2, 8, 18, 6.
What are the oxidation states of Selenium?
The listed oxidation states are -2, 2, 4, 6.
How can I view the Selenium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.