Praseodymium: properties of free atoms

Praseodymium atoms have 59 electrons and the shell structure is  2.8.18.21.8.2.

The ground state electron configuration of ground state gaseous neutral praseodymium is  [Xe].4f3.6s2 and the term symbol is  4I9/2.

Atomic spectrum

 

A representation of the atomic spectrum of praseodymium.

Electronic configuration of neutral atomic praseodymium

Electronic configuration of praseodymium

The electronic configuration of praseodymium.

Kossel shell structure of praseodymium

The Kossel shell structure of praseodymium.

Ionisation Energies and electron affinity

The electron affinity of praseodymium is 50 kJ mol‑1. The ionisation energies of praseodymium are given below.

Ionisation energies of praseodymium
Ionisation energy number Enthalpy / kJ mol‑1
1st527
2nd1020
3rd2086
4th3761
5th5551

Effective Nuclear Charges

The following are "Clementi-Raimondi" effective nuclear charges, Zeff. Follow the hyperlinks for more details and for graphs in various formats.

Effective nuclear charges for praseodymium
1s57.83  
2s43.46 2p54.77  
3s39.50 3p39.82 3d45.15  
4s30.33 4p29.06 4d26.30 4f21.10
5s17.61 5p15.28 5d(no data)  
6s7.75 6p(no data)  
7s   

References

These effective nuclear charges, Zeff, are adapted from the following references:

  1. E. Clementi and D.L.Raimondi, J. Chem. Phys. 1963, 38, 2686.
  2. E. Clementi, D.L.Raimondi, and W.P. Reinhardt, J. Chem. Phys. 1967, 47, 1300.

Electron binding energies

Electron binding energies for praseodymium. All values of electron binding energies are given in eV. The binding energies are quoted relative to the vacuum level for rare gases and H2, N2, O2, F2, and Cl2 molecules; relative to the Fermi level for metals; and relative to the top of the valence band for semiconductors.
Label Orbital eV [literature reference]
K 1s41991 [1]
L I2s6835 [1]
L II2p1/26440 [1]
L III2p3/25964 [1]
M I3s1511 [1]
M II3p1/21337 [1]
M III3p3/21242 [1]
M IV3d3/2948.3 [2]
M V3d5/2928.8 [2]
N I4s304.5 [1]
N II4p1/2236.3 [1]
N III4p3/2217.6 [1]
N IV4d3/2115.1 [2]
N V4d5/2115.1 [2]
N VI4f5/22 [1]
N VII4f7/22 [1]
O I5s37.4 [1]
O II5p1/222.3 [1]
O III5p3/222.3 [1]

Notes

I am grateful to Gwyn Williams (Jefferson Laboratory, Virginia, USA) who provided the electron binding energy data. The data are adapted from references 1-3. They are tabulated elsewhere on the WWW (reference 4) and in paper form (reference 5).

References

  1. J. A. Bearden and A. F. Burr, "Reevaluation of X-Ray Atomic Energy Levels," Rev. Mod. Phys., 1967, 39, 125.
  2. M. Cardona and L. Ley, Eds., Photoemission in Solids I: General Principles (Springer-Verlag, Berlin) with additional corrections, 1978.
  3. Gwyn Williams WWW table of values
  4. D.R. Lide, (Ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 81st edition, 2000.
  5. J. C. Fuggle and N. Mårtensson, "Core-Level Binding Energies in Metals," J. Electron Spectrosc. Relat. Phenom., 1980, 21, 275.

WebElements Shop

You can buy periodic table posters, mugs, T-shirts, fridge magnets, games, molecular models, and more at the WebElements shop