Properties of protactinium atoms

Ionisation Energies and electron affinity

The electron affinity of protactinium is no data  kJ mol-1. The ionisation energies of protactinium are given below.

Ionisation energy number Enthalpy /kJ mol-1
1st 568

Ionisation energies of Pa

Electronic configuration

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

Pointer to The Orbitron gallery of orbitals.

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

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protactinium atomic number