{glossarbot=disable}Electron configuration

Electron configurations of the neutral gaseous atoms in the ground state. Given by subshells in concise form, by subshells written out, and by number of electrons per shell.

References- Electron Configurations of the Elements:

All sources concur with the data above except in the separately listed instances: 

NIST- Electron Configurations of the Elements:

• http://physics.nist.gov/PhysRefData/IonEnergy/ionEnergy.html ; retrieved July 2005, (elements 1–104) based on:

  • Atomic Spectroscopy, by W.C. Martin and W.L. Wiese in Atomic, Molecular, & Optical Physics Handbook, ed. by G.W.F. Drake (AIP, Woodbury, NY, 1996) Chapter 10, pp. 135-153.

This website is also cited in the CRC Handbook as source of Section 1, subsection Electron Configuration of Neutral Atoms in the Ground State.

• 91 Pa : [Rn] 5f2(3H4) 6d 7s2

• 92 U : [Rn] 5f3(4Io9/2) 6d 7s2

• 93 Np : [Rn] 5f4(5I4) 6d 7s2

• 103 Lr : [Rn] 5f14 7s2 7p1 question-marked

• 104 Rf : [Rn] 5f14 6d2 7s2 question-marked 

CRC- Electron Configurations of the Elements:

• David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition, online version. CRC Press. Boca Raton, Florida, 2003; Section 1, Basic Constants, Units, and Conversion Factors; Electron Configuration of Neutral Atoms in the Ground State. (elements 1–104)

• Also subsection Periodic Table of the Elements, (elements 1–103) based on:

  • G. J. Leigh, Editor, Nomenclature of Inorganic Chemistry, Blackwell Scientific Publications, Oxford, 1990.

  • Chemical and Engineering News, 63(5), 27, 1985.

  • Atomic Weights of the Elements, 1999, Pure & Appl. Chem., 73, 667, 2001.  

Web Elements- Electron Configurations of the Elements:

• http://www.webelements.com/ ; retrieved July 2005, electron configurations based on:

  • Atomic, Molecular, & Optical Physics Handbook, Ed. Gordon W. F. Drake, American Institute of Physics, Woodbury, New York, USA, 1996.

  • J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.

  • R.L. DeKock and H.B. Gray in Chemical Structure and bonding, Benjamin/Cummings, Menlo Park, California, USA, 1980.

  • A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.

• 103 Lr : [Rn].5f14.7s2.7p1 tentative ; 2.8.18.32.32.9.2 [inconsistent]

• 104 Rf : [Rn].5f14.6d2.7s2 tentative

• 105 Db : [Rn].5f14.6d3.7s2 (a guess based upon that of tantalum) ; 2.8.18.32.32.11.2

• 106 Sg : [Rn].5f14.6d4.7s2 (a guess based upon that of tungsten) ; 2.8.18.32.32.12.2

• 107 Bh : [Rn].5f14.6d5.7s2 (a guess based upon that of rhenium) ; 2.8.18.32.32.13.2

• 108 Hs : [Rn].5f14.6d6.7s2 (a guess based upon that of osmium) ; 2.8.18.32.32.14.2

• 109 Mt : [Rn].5f14.6d7.7s2 (a guess based upon that of iridium) ; 2.8.18.32.32.15.2

• 110 Ds : [Rn].5f14.6d9.7s1 (a guess based upon that of platinum) ; 2.8.18.32.32.17.1

• 111 Rg : [Rn].5f14.6d10.7s1 (a guess based upon that of gold) ; 2.8.18.32.32.18.1

• 112 Uub : [Rn].5f14.6d10.7s2 (a guess based upon that of mercury) ; 2.8.18.32.32.18.2

• 113 Uut : [Rn].5f14.6d10.7s2.7p1 (a guess based upon that of thallium) ; 2.8.18.32.32.18.3

• 114 Uuq : [Rn].5f14.6d10.7s2.7p2 (a guess based upon that of lead) ; 2.8.18.32.32.18.4

• 115 Uup : [Rn].5f14.6d10.7s2.7p3 (a guess based upon that of bismuth) ; 2.8.18.32.32.18.5

• 116 Uuh : [Rn].5f14.6d10.7s2.7p4 (a guess based upon that of polonium) ; 2.8.18.32.32.18.6

• 117 Uus : [Rn].5f14.6d10.7s2.7p5 (a guess based upon that of astatine) ; 2.8.18.32.32.18.7

• 118 Uuo : [Rn].5f14.6d10.7s2.7p6 (a guess based upon that of radon) ; 2.8.18.32.32.18.8 

Lange- Electron Configurations of the Elements:

• J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), online version, McGraw-Hill, 1999; Section 4, Table 4.1 Electronic Configuration and Properties of the Elements. (Elements 1–103)

• 97 Bk : [Rn] 5f8 6d 7s2

• 103 Lr : [Rn] 4f14 [sic] 6d 7s2