NEET Chemistry
Calcium: electronic configuration and properties
Calcium has atomic number 20 and electronic configuration [Ar] 4s2. Explore its periodic behaviour and open the interactive atom model.
Open Calcium in 3DKey properties of Calcium
- Symbol
- Ca
- Atomic number
- 20
- Atomic mass
- 40.078(4)
- Family
- alkaline earth metal
- Electronic configuration
- [Ar] 4s2
- Shell distribution
- 2, 8, 8, 2
- Oxidation states
- 2
- Standard state
- solid
Periodic behaviour
Atomic radius: 174 pm. Electronegativity: 1. First ionisation energy: 590 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 Calcium.
Related alkaline earth metal elements
Frequently asked questions
What is the electronic configuration of Calcium?
Calcium has electronic configuration [Ar] 4s2, with shell distribution 2, 8, 8, 2.
What are the oxidation states of Calcium?
The listed oxidation states are 2.
How can I view the Calcium atom in 3D?
PracticeNEET's interactive periodic table provides a rotatable schematic atom with accurate electron populations by shell.