Neptunium

Atom properties


Radii


Ionic radius (Å): Np(VII): 0.71 (6-coordinate) [1]
Np(VI): 0.72 (6-coordinate) [1]
Np(V): 0.75 (6-coordinate) [1]
Np(IV): 0.87 (6-coordinate) [1]
Np(III): 1.01 (6-coordinate) [1]
Np(II): 1.10 (6-coordinate) [1]


Electron configuration


Ground state: 1s2-2s2-2p6-3s2-3p6-4s2-3d10-4p6-4d10-4f14-5s2-5p6-5d10-5f4-6s2-6p6-6d1-7s2