Editing Electronegativity (section)

===Allred–Rochow electronegativity===
{{Anchor|Allred–Rochow electronegativity}}

[[Image:Pauling and Allred-Rochow electronegativities.png|thumb|upright=1.35|The correlation between Allred–Rochow electronegativities (''x''-axis, in Å<sup>−2</sup>) and Pauling electronegativities (''y''-axis).]]
[[Albert L. Allred|A. Louis Allred]] and [[Eugene G. Rochow]] considered<ref>{{cite journal|author1=Allred, A. L. |author2=Rochow, E. G. |year=1958| journal=Journal of Inorganic and Nuclear Chemistry|volume=5|pages=264–268|doi=10.1016/0022-1902(58)80003-2|title=A scale of electronegativity based on electrostatic force|issue=4}}</ref> that electronegativity should be related to the charge experienced by an electron on the "surface" of an atom: The higher the charge per unit area of atomic surface the greater the tendency of that atom to attract electrons. The [[effective nuclear charge]], ''Z''<sub>eff</sub>, experienced by [[valence electron]]s can be estimated using [[Slater's rules]], while the surface area of an atom in a molecule can be taken to be proportional to the square of the [[covalent radius]], ''r''<sub>cov</sub>. When ''r''<sub>cov</sub> is expressed in [[picometre]]s,<ref>{{cite book |last1=Housecroft |first1=C.E. |last2=Sharpe |first2=A.G. |title=Inorganic Chemistry |url=https://www.pearson.com/us/higher-education/program/Housecroft-Inorganic-Chemistry-5th-Edition/PGM2178749.html |type=eBook |language=en |volume=3 |edition=15th |location=Switzerland |publisher=Pearson Prentice-Hall |publication-date=November 1, 1993 |page=38 |doi=10.1021/ed070pA304.1|isbn=9780273742753 |via=University of Basel}} [https://archive.org/details/Inorganic_Chemistry_4th_edition_by_Catherine_Housecroft_Alan_G._Sharpe Alt URL]</ref>
<math display="block">\chi = 3590{{Z_{\rm eff}}\over{r^2_{\rm cov}}} + 0.744</math>