Editing VSEPR theory (section)

===Superheavy elements===
[[Relativistic quantum chemistry|Relativistic effects]] on the electron orbitals of [[superheavy element]]s is predicted to influence the molecular geometry of some compounds. For instance, the 6d<sub>5/2</sub> electrons in [[nihonium]] play an unexpectedly strong role in bonding, so NhF<sub>3</sub> should assume a T-shaped geometry, instead of a trigonal planar geometry like its lighter congener BF<sub>3</sub>.<ref>{{cite journal |last1=Seth |first1=Michael |last2=Schwerdtfeger |first2=Peter |first3=Knut |last3=Fægri |date=1999 |title=The chemistry of superheavy elements. III. Theoretical studies on element 113 compounds |journal=Journal of Chemical Physics |volume=111 |issue=14 |pages=6422–6433 |doi=10.1063/1.480168 |bibcode=1999JChPh.111.6422S|s2cid=41854842 |doi-access=free |hdl=2292/5178 |hdl-access=free }}</ref> In contrast, the extra stability of the 7p<sub>1/2</sub> electrons in [[tennessine]] are predicted to make TsF<sub>3</sub> trigonal planar, unlike the T-shaped geometry observed for IF<sub>3</sub> and predicted for [[Astatine|At]]F<sub>3</sub>;<ref>{{Cite journal |last1=Bae |first1=Ch. |last2=Han |first2=Y.-K. |last3=Lee |first3=Yo. S. |doi=10.1021/jp026531m |title=Spin−Orbit and Relativistic Effects on Structures and Stabilities of Group 17 Fluorides EF<sub>3</sub> (E = I, At, and Element 117): Relativity Induced Stability for the ''D<sub>3h</sub>'' Structure of (117)F<sub>3</sub> |journal=The Journal of Physical Chemistry A |volume=107 |issue=6 |pages=852–858 |date=18 January 2003 |bibcode=2003JPCA..107..852B}}</ref> similarly, [[Oganesson|Og]]F<sub>4</sub> should have a tetrahedral geometry, while XeF<sub>4</sub> has a square planar geometry and [[Radon|Rn]]F<sub>4</sub> is predicted to have the same.<ref name=fluoride>{{cite journal|journal=Journal of Physical Chemistry A|volume=103|issue=8|pages=1104–1108|date=1999|title=Structures of RgFn (Rg = Xe, Rn, and Element 118. n = 2, 4.) Calculated by Two-component Spin-Orbit Methods. A Spin-Orbit Induced Isomer of (118)F<sub>4</sub>|first1=Young-Kyu|last1=Han|first2=Yoon Sup|last2=Lee|doi=10.1021/jp983665k|bibcode=1999JPCA..103.1104H}}</ref>