Properties of erbium atoms

Ionisation Energies and electron affinity

The electron affinity of erbium is 50  kJ mol-1. The ionisation energies of erbium are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 589.3
2nd 1150
3rd 2194
4th 4120

Ionisation energies of Er

Electronic configuration

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

Pointer to The Orbitron gallery of orbitals.

Kossel shell structure of Er
A schematic representation of the shell structure of erbium - not what the atom of erbium "looks like".

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erbium atomic number