Properties of neptunium atoms

Ionisation Energies and electron affinity

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

Ionisation energy number Enthalpy /kJ mol-1
1st 604.5

Ionisation energies of Np

Electronic configuration

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

Pointer to The Orbitron gallery of orbitals.

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

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neptunium atomic number