Editing Extended periodic table (section)

===Electron configurations===
The following are expected electron configurations of elements 119–174 and 184. The symbol [Og] indicates the probable electron configuration of oganesson (Z = 118), which is currently the last known element. The configurations of the elements in this table are written starting with [Og] because oganesson is expected to be the last prior element with a closed-shell (inert gas) configuration, 1s<sup>2</sup> 2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</sup> 3p<sup>6</sup> 3d<sup>10</sup> 4s<sup>2</sup> 4p<sup>6</sup> 4d<sup>10</sup> 4f<sup>14</sup> 5s<sup>2</sup> 5p<sup>6</sup> 5d<sup>10</sup> 5f<sup>14</sup> 6s<sup>2</sup> 6p<sup>6</sup> 6d<sup>10</sup> 7s<sup>2</sup> 7p<sup>6</sup>. Similarly, the [172] in the configurations for elements 173, 174, and 184 denotes the likely closed-shell configuration of element 172.

Beyond element 123, no complete calculations are available and hence the data in this table must be taken as [[wiktionary:tentative|tentative]].<ref name="BFricke"/><ref name="BFricke1977"/><ref name="E123-vdSchoor2011">{{cite thesis|last=van der Schoor|first=K.|title=Electronic structure of element 123|url=http://fse.studenttheses.ub.rug.nl/14531/1/report.pdf|date=2016|publisher=Rijksuniversiteit Groningen}}</ref> In the case of element 123, and perhaps also heavier elements, several possible electron configurations are predicted to have very similar energy levels, such that it is very difficult to predict the [[ground state]]. All configurations that have been proposed (since it was understood that the Madelung rule probably stops working here) are included.<ref name="Umemoto"/><ref name="E123-vdSchoor2011"/><ref>{{Cite journal|url=https://link.springer.com/article/10.1007/s00214-010-0887-3|doi = 10.1007/s00214-010-0887-3|title = Are MCDF calculations 101% correct in the super-heavy elements range?|year = 2011|last1 = Indelicato|first1 = Paul|last2 = Bieroń|first2 = Jacek|last3 = Jönsson|first3 = Per|journal = Theoretical Chemistry Accounts|volume = 129|issue = 3–5|pages = 495–505|hdl = 2043/12984|s2cid = 54680128|hdl-access = free}}</ref>

The predicted block assignments up to 172 are Kulsha's,<ref name=dications>{{Cite web|url=http://www.primefan.ru/stuff/chem/ptable/dications.html|title = Feasible electron configurations of dications up to Z = 172|access-date=2021-07-04}}</ref> following the expected available valence orbitals. There is, however, not a consensus in the literature as to how the blocks should work after element 138.

:{| class="wikitable"
! colspan="3" | [[Chemical element]] !! [[Block (periodic table)|Block]] !! Predicted [[electron configuration]]s<ref name=Haire/><ref name="BFricke"/><ref name=nefedov/><ref name="BFricke1977"/>
|-bgcolor="{{element color|s-block}}"
|| 119 || '''Uue''' || [[Ununennium]] ||s-block ||[Og] 8s<sup>1</sup>
|-bgcolor="{{element color|s-block}}"
|| 120 || '''Ubn''' || [[Unbinilium]] ||s-block ||[Og] 8s<sup>2</sup>
|-bgcolor="{{element color|g-block}}"
|| 121 || '''Ubu''' || [[Unbiunium]] ||g-block || [Og] 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<ref name=Umemoto/>
|-bgcolor="{{element color|g-block}}"
|| 122 || '''Ubb''' || [[Unbibium]] ||g-block || [Og] 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><br/>[Og] 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 123 || '''Ubt''' || Unbitrium ||g-block || [Og] 6f<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig>{{cite web |url=http://www.primefan.ru/stuff/chem/ptable/ptable.html |title=Archived copy |website=primefan.ru |access-date=15 January 2022 |archive-url=https://web.archive.org/web/20160305034205/http://www.primefan.ru/stuff/chem/ptable/ptable.html |archive-date=5 March 2016 |url-status=dead}}</ref><br/>[Og] 6f<sup>1</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<ref name=Umemoto/><ref name="E123-vdSchoor2011"/><br/>[Og] 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<br/>[Og] 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=1|b=3/2}}<ref name="E123-vdSchoor2011"/>
|-bgcolor="{{element color|g-block}}"
|| 124 || '''Ubq''' || [[Unbiquadium]] ||g-block || [Og] 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><ref name=econfig/><br/>[Og] 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 125 || '''Ubp''' || Unbipentium ||g-block || [Og] 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<ref name=Umemoto/><br/>[Og] 5g<sup>1</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>1</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<br/>[Og] 8s<sup>2</sup> 0.81(5g<sup>1</sup> 6f<sup>2</sup> 8p{{su|p=2|b=1/2}}) + 0.17(5g<sup>1</sup> 6f<sup>1</sup> 7d<sup>2</sup> 8p{{su|p=1|b=1/2}}) + 0.02(6f<sup>3</sup> 7d<sup>1</sup> 8p{{su|p=1|b=1/2}})
|-bgcolor="{{element color|g-block}}"
|| 126 || '''Ubh''' || [[Unbihexium]] ||g-block || [Og] 5g<sup>1</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<ref name=Umemoto/><br/>[Og] 5g<sup>2</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>2</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<br/>[Og] 8s<sup>2</sup> 0.998(5g<sup>2</sup> 6f<sup>3</sup> 8p{{su|p=1|b=1/2}}) + 0.002(5g<sup>2</sup> 6f<sup>2</sup> 8p{{su|p=2|b=1/2}})
|-bgcolor="{{element color|g-block}}"
|| 127 || '''Ubs''' || Unbiseptium ||g-block || [Og] 5g<sup>2</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><br/>[Og] 5g<sup>3</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 8s<sup>2</sup> 0.88(5g<sup>3</sup> 6f<sup>2</sup> 8p{{su|p=2|b=1/2}}) + 0.12(5g<sup>3</sup> 6f<sup>1</sup> 7d<sup>2</sup> 8p{{su|p=1|b=1/2}})
|-bgcolor="{{element color|g-block}}"
|| 128 || '''Ubo''' ||Unbioctium||g-block || [Og] 5g<sup>3</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><br/>[Og] 5g<sup>4</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 8s<sup>2</sup> 0.88(5g<sup>4</sup> 6f<sup>2</sup> 8p{{su|p=2|b=1/2}}) + 0.12(5g<sup>4</sup> 6f<sup>1</sup> 7d<sup>2</sup> 8p{{su|p=1|b=1/2}})
|-bgcolor="{{element color|g-block}}"
|| 129 || '''Ube''' || Unbiennium ||g-block || [Og] 5g<sup>4</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<br/>[Og] 5g<sup>4</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><ref name=econfig/><br/>[Og] 5g<sup>5</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>4</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 130 || '''Utn''' || Untrinilium ||g-block || [Og] 5g<sup>5</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}<br/>[Og] 5g<sup>5</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><ref name=econfig/><br/>[Og] 5g<sup>6</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>5</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=1|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 131 || '''Utu''' || Untriunium ||g-block || [Og] 5g<sup>6</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=Umemoto/><ref name=econfig/><br/>[Og] 5g<sup>7</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 8s<sup>2</sup> 0.86(5g<sup>6</sup> 6f<sup>3</sup> 8p{{su|p=2|b=1/2}}) + 0.14(5g<sup>6</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8p{{su|p=1|b=1/2}})
|-bgcolor="{{element color|g-block}}"
|| 132 || '''Utb''' || Untribium ||g-block || [Og] 5g<sup>7</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>8</sup> 6f<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 133 || '''Utt''' || Untritrium ||g-block || [Og] 5g<sup>8</sup> 6f<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 134 || '''Utq''' || Untriquadium ||g-block || [Og] 5g<sup>8</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 135 || '''Utp''' || Untripentium ||g-block || [Og] 5g<sup>9</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 136 || '''Uth''' || Untrihexium ||g-block || [Og] 5g<sup>10</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 137 || '''Uts''' || Untriseptium ||g-block || [Og] 5g<sup>11</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 138 || '''Uto''' || Untrioctium ||g-block || [Og] 5g<sup>12</sup> 6f<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>12</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 139 || '''Ute''' || Untriennium ||g-block || [Og] 5g<sup>13</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>13</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}
|-bgcolor="{{element color|g-block}}"
|| 140 || '''Uqn''' || Unquadnilium ||g-block || [Og] 5g<sup>14</sup> 6f<sup>3</sup> 7d<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>15</sup> 6f<sup>1</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=2|b=3/2}}
|-bgcolor="{{element color|g-block}}"
|| 141 || '''Uqu''' || Unquadunium ||g-block || [Og] 5g<sup>15</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|g-block}}"
|| 142 || '''Uqb''' || Unquadbium ||g-block || [Og] 5g<sup>16</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 143 || '''Uqt''' || Unquadtrium ||f-block || [Og] 5g<sup>17</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 144 || '''Uqq''' || Unquadquadium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>2</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/><br/>[Og] 5g<sup>18</sup> 6f<sup>1</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>17</sup> 6f<sup>2</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 8s<sup>2</sup> 0.95(5g<sup>17</sup> 6f<sup>2</sup> 7d<sup>3</sup> 8p{{su|p=2|b=1/2}}) + 0.05(5g<sup>17</sup> 6f<sup>4</sup> 7d<sup>1</sup> 8p{{su|p=2|b=1/2}})
|-bgcolor="{{element color|f-block}}"
|| 145 || '''Uqp''' || Unquadpentium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>3</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 146 || '''Uqh''' || Unquadhexium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>4</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 147 || '''Uqs''' || Unquadseptium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>5</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 148 || '''Uqo''' || Unquadoctium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>6</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 149 || '''Uqe''' || Unquadennium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>6</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 150 || '''Upn''' || Unpentnilium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>6</sup> 7d<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>7</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 151 || '''Upu''' || Unpentunium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>8</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 152 || '''Upb''' || Unpentbium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>9</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 153 || '''Upt''' || Unpenttrium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>10</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>11</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 154 || '''Upq''' || Unpentquadium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>11</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>12</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 155 || '''Upp''' || Unpentpentium ||f-block || [Og] 5g<sup>18</sup> 6f<sup>12</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>13</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|f-block}}"
|| 156 || '''Uph''' || Unpenthexium ||f-block|| [Og] 5g<sup>18</sup> 6f<sup>13</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>2</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 157 || '''Ups''' || Unpentseptium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>3</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 158 || '''Upo''' || Unpentoctium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 159 || '''Upe''' || Unpentennium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>5</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>4</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}" {{Anchor|Uhn|Unhexnilium}}
|| 160 || '''Uhn''' || Unhexnilium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>6</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>5</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 161 || '''Uhu''' || Unhexunium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>7</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>6</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 162 || '''Uhb''' || Unhexbium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>8</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>7</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 163 || '''Uht''' || Unhextrium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>9</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>8</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 164 || '''Uhq''' || Unhexquadium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 165 || '''Uhp''' || Unhexpentium ||d-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>1</sup><ref name=econfig/>
|-bgcolor="{{element color|d-block}}"
|| 166 || '''Uhh''' || Unhexhexium ||d-block ||[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>2</sup><ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 167 || '''Uhs''' || Unhexseptium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>2</sup> 9p{{su|p=1|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=1|b=3/2}} 9s<sup>2</sup><ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 168 || '''Uho''' || Unhexoctium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 9s<sup>2</sup> 9p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=2|b=3/2}} 9s<sup>2</sup><ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 169 || '''Uhe''' || Unhexennium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=1|b=3/2}} 9s<sup>2</sup> 9p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=3|b=3/2}} 9s<sup>2</sup><ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 170 || '''Usn''' || Unseptnilium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=2|b=3/2}} 9s<sup>2</sup> 9p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=4|b=3/2}} 9s<sup>2</sup><ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 171 || '''Usu''' || Unseptunium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=3|b=3/2}} 9s<sup>2</sup> 9p{{su|p=2|b=1/2}}<br/>[Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=4|b=3/2}} 9s<sup>2</sup> 9p{{su|p=1|b=1/2}}<ref name=econfig/>
|-bgcolor="{{element color|p-block}}"
|| 172 || '''{{Not a typo|Usb}}''' || Unseptbium ||p-block || [Og] 5g<sup>18</sup> 6f<sup>14</sup> 7d<sup>10</sup> 8s<sup>2</sup> 8p{{su|p=2|b=1/2}} 8p{{su|p=4|b=3/2}} 9s<sup>2</sup> 9p{{su|p=2|b=1/2}}<ref name=econfig/>
|-
|| 173 || '''Ust''' || Unsepttrium || ? || [172] 6g<sup>1</sup><br/>[172] 9p{{su|p=1|b=3/2}}<br/>[172] 10s<sup>1</sup><ref name=eliav2023>{{cite web |url=https://indico.jinr.ru/event/3622/contributions/20027/attachments/15317/25832/Ephraim%20Eliav%20Yerevan-2023F.pptx |title=Benchmark atomic electronic structures calculations at the edge of Periodic Table |last=Eliav |first=Ephraim |date=26 April 2023 |website=jinr.ru |publisher=JINR |access-date=29 July 2023 |quote=}}</ref>
|-
|| 174 || '''Usq''' || Unseptquadium || ? || [172] 8d<sup>1</sup> 10s<sup>1</sup><ref name=eliav2023/>
|-
|| ... || ... || ... || ... || ...
|-
|| 184 || '''Uoq''' || Unoctquadium || ? || [172] 6g<sup>5</sup> 7f<sup>4</sup> 8d<sup>3</sup>
|}