NEET Chemistry
Helium: electronic configuration and properties
Helium has atomic number 2 and electronic configuration 1s2. Explore its periodic behaviour and open the interactive atom model.
Open Helium in 3DKey properties of Helium
- Symbol
- He
- Atomic number
- 2
- Atomic mass
- 4.002602(2)
- Family
- noble gas
- Electronic configuration
- 1s2
- Shell distribution
- 2
- Oxidation states
- Not listed
- Standard state
- gas
Periodic behaviour
Atomic radius: 32 pm. Electronegativity: not experimentally determined. First ionisation energy: 2372 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 Helium.
Related noble gas elements
Frequently asked questions
What is the electronic configuration of Helium?
Helium has electronic configuration 1s2, with shell distribution 2.
What are the oxidation states of Helium?
No common oxidation state is listed for Helium in this dataset.
How can I view the Helium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.