โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Arsenic
  • ๐Ÿ‡บ๐Ÿ‡ฆ ะœั–ัˆ'ัะบ
  • ๐Ÿ‡จ๐Ÿ‡ณ ็ ท
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Arseen
  • ๐Ÿ‡ซ๐Ÿ‡ท Arsenic
  • ๐Ÿ‡ฉ๐Ÿ‡ช Arsen
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืืจืกืŸ
  • ๐Ÿ‡ฎ๐Ÿ‡น Arsenico
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ’็ด 
  • ๐Ÿ‡ต๐Ÿ‡น Arsênico
  • ๐Ÿ‡ช๐Ÿ‡ธ Arsénico
  • ๐Ÿ‡ธ๐Ÿ‡ช Arsenik
  • ๐Ÿ‡ท๐Ÿ‡บ ะœั‹ัˆัŒัะบ

Arsenic - 33As: properties of free atoms

Arsenic atoms have 33 electrons and the shell structure is  2.8.18.5.

The ground state electron configuration of ground state gaseous neutral arsenic is  [Ar].3d10.4s2.4p3 and the term symbol is  4S3/2.

Kossel shell structure of arsenic
Schematic electronic configuration of arsenic.
Kossel shell structure of arsenic
The Kossel shell structure of arsenic.

Atomic spectrum

 

A representation of the atomic spectrum of arsenic.

Ionisation Energies and electron affinity

The electron affinity of arsenic is 78 kJ mol‑1. The ionisation energies of arsenic are given below.

Ionisation energies of arsenic
Ionisation energy number Enthalpy / kJ mol‑1
1st944.45
2nd1793.58
3rd2735.3
4th4839
5th6056
6th11690
7th14180
8th17370
9th20550
10th23830
11th28560
12th32130 (calculated)
13th36180
14th40330
15th44380
16th56690
17th60670
18th64920
19th70330
20th74680
21st78540
Ionisation energies of arsenic
Ionisation energies of arsenic.

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 arsenic
1s32.2783  
2s24.13 2p29.07  
3s18.60 3p17.85 3d17.38  
4s8.94 4p7.45 4d(no data) 4f(no data)
5s(no data) 5p(no data) 5d(no data)  
6s(no data) 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 arsenic. 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 1s11867 [1]
L I2s1527 [2, values derived from reference 1]
L II2p1/21359.1 [2, values derived from reference 1]
L III2p3/21323.6 [2, values derived from reference 1]
M I3s204.7 [2]
M II3p1/2146.2 [2]
M III3p3/2141.2 [2]
M IV3d3/241.7 [2]
M V3d5/241.7 [2]

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.