Calcium

Properties of calcium atoms

Ionisation Energies and electron affinity

The electron affinity of calcium is 2.37  kJ mol^-1. The ionisation energies of calcium are given below.

Electronic configuration

The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom. The configuration associated with calcium in its compounds is not necessarily the same.

• Ground state electron configuration:  [Ar].4s²
• Shell structure:  2.8.8.2
• Term symbol:   ¹S₀

A schematic representation of the shell structure of calcium - not what the atom of calcium "looks like".

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