Properties of lanthanum atoms

Ionisation Energies and electron affinity

The electron affinity of lanthanum is 48  kJ mol-1. The ionisation energies of lanthanum are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 538.1
2nd 1067
3rd 1850.3
4th 4819
5th 5940

Ionisation energies of La

Electronic configuration

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

Pointer to The Orbitron gallery of orbitals.

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

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lanthanum atomic number