Editing Extended periodic table (section)

===Nefedov===
{{ill|Vadim Nefedov|lt=Nefedov|ru|Нефёдов, Вадим Иванович}}, Trzhaskovskaya, and Yarzhemskii carried out calculations up to 164 (results published in 2006). They considered elements 158 through 164 to be homologues of groups 4 through 10, and not 6 through 12, noting similarities of electron configurations to the period 5 transition metals (e.g. element 159 7d<sup>4</sup>9s<sup>1</sup> vs Nb 4d<sup>4</sup>5s<sup>1</sup>, element 160 7d<sup>5</sup>9s<sup>1</sup> vs Mo 4d<sup>5</sup>5s<sup>1</sup>, element 162 7d<sup>7</sup>9s<sup>1</sup> vs Ru 4d<sup>7</sup>5s<sup>1</sup>, element 163 7d<sup>8</sup>9s<sup>1</sup> vs Rh 4d<sup>8</sup>5s<sup>1</sup>, element 164 7d<sup>10</sup>9s<sup>0</sup> vs Pd 4d<sup>10</sup>5s<sup>0</sup>). They thus agree with Fricke et al. on the chemically most analogous groups, but differ from them in that Nefedov et al. actually place elements in the chemically most analogous groups. Rg and Cn are given an asterisk to reflect differing configurations from Au and Hg (in the original publication they are drawn as being displaced in the third dimension). In fact Cn probably has an analogous configuration to Hg, and the difference in configuration between Pt and Ds is not marked.<ref name=nefedov/>
{| class="wikitable" style="text-align: center;"
|+Nefedov et al.'s suggested form (fragment)
|-
| Cs
| Ba
| La–Lu
| Hf
| Ta
| W
| Re
| Os
| Ir
| Pt
| Au
| Hg
| Tl
| Pb
| Bi
| Po
| At
| Rn
|-
| Fr
| Ra
| Ac–Lr
| Rf
| Db
| Sg
| Bh
| Hs
| Mt
| Ds
| Rg*
| Cn*
| Nh
| Fl
| Mc
| Lv
| Ts
| Og
|-
| 119
| 120
| {{nowrap|121–157}}

| 158
| 159
| 160
| 161
| 162
| 163
| 164
|
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|}