Tabel periodik perluasan
Sifat yang diprediksi dari unsur periode kedelapan > Konfigurasi elektron

Berikut ini adalah konfigurasi elektron yang diperkirakan dari unsur 119–173 dan 184. Lambang [Og] menunjukkan kemungkinan konfigurasi elektron oganeson (Z = 118), yang saat ini merupakan unsur terakhir yang diketahui. Konfigurasi unsur-unsur dalam tabel ini ditulis dimulai dengan [Og] karena oganeson diperkirakan menjadi unsur terakhir dengan konfigurasi kulit tertutup (gas lengai), 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6. Demikian pula, [172] in the configurations for elements 173 and 184 denotes the likely closed-shell configuration of element 172.
Setelah unsur 123, tidak ada perhitungan lengkap yang tersedia dan karenanya data dalam tabel ini harus dianggap tentatif. Dalam kasus unsur 123, dan mungkin juga unsur yang lebih berat, beberapa kemungkinan konfigurasi elektron diprediksi memiliki tingkat energi yang sangat mirip, sehingga sangat sulit untuk memprediksi keadaan dasarnya. Semua konfigurasi yang telah diusulkan (sejak dipahami bahwa aturan Madelung mungkin berhenti bekerja di sini) disertakan.
Penetapan blok yang diprediksi hingga 172 adalah prediksi Kulsha, mengikuti orbital valensi yang tersedia yang diperkirakan. Namun, tidak ada konsensus dalam literatur tentang bagaimana blok harus bekerja setelah unsur 138.
| Unsur kimia | Unsur kimia | Unsur kimia | Blok | Konfigurasi elektron yang diprediksi |
| --- | --- | --- | --- | --- |
| 119 | Uue | Ununenium | blok-s | [Og] 8s1 |
| 120 | Ubn | Unbinilium | blok-s | [Og] 8s2 |
| 121 | Ubu | Unbiunium | blok-g | [Og] 8s2 8p11/2 |
| 122 | Ubb | Unbibium | blok-g | [Og] 8s2 8p21/2 [Og] 7d1 8s2 8p11/2 |
| 123 | Ubt | Unbitrium | blok-g | [Og] 6f1 8s2 8p21/2 [Og] 6f1 7d1 8s2 8p11/2 [Og] 6f2 8s2 8p11/2 [Og] 8s2 8p21/2 8p13/2 |
| 124 | Ubq | Unbiquadium | blok-g | [Og] 6f2 8s2 8p21/2 [Og] 6f3 8s2 8p11/2 |
| 125 | Ubp | Unbipentium | blok-g | [Og] 6f4 8s2 8p11/2 [Og] 5g1 6f2 8s2 8p21/2 [Og] 5g1 6f3 8s2 8p11/2 [Og] 8s2 0,81(5g1 6f2 8p21/2) + 0,17(5g1 6f1 7d2 8p11/2) + 0,02(6f3 7d1 8p11/2) |
| 126 | Ubh | Unbiheksium | blok-g | [Og] 5g1 6f4 8s2 8p11/2 [Og] 5g2 6f2 8s2 8p21/2 [Og] 5g2 6f3 8s2 8p11/2 [Og] 8s2 0,998(5g2 6f3 8p11/2) + 0,002(5g2 6f2 8p21/2) |
| 127 | Ubs | Unbiseptium | blok-g | [Og] 5g2 6f3 8s2 8p21/2 [Og] 5g3 6f2 8s2 8p21/2 [Og] 8s2 0,88(5g3 6f2 8p21/2) + 0,12(5g3 6f1 7d2 8p11/2) |
| 128 | Ubo | Unbioktium | blok-g | [Og] 5g3 6f3 8s2 8p21/2 [Og] 5g4 6f2 8s2 8p21/2 [Og] 8s2 0,88(5g4 6f2 8p21/2) + 0,12(5g4 6f1 7d2 8p11/2) |
| 129 | Ube | Unbienium | blok-g | [Og] 5g4 6f3 7d1 8s2 8p11/2 [Og] 5g4 6f3 8s2 8p21/2 [Og] 5g5 6f2 8s2 8p21/2 [Og] 5g4 6f3 7d1 8s2 8p11/2 |
| 130 | Utn | Untrinilium | blok-g | [Og] 5g5 6f3 7d1 8s2 8p11/2 [Og] 5g5 6f3 8s2 8p21/2 [Og] 5g6 6f2 8s2 8p21/2 [Og] 5g5 6f3 7d1 8s2 8p11/2 |
| 131 | Utu | Untriunium | blok-g | [Og] 5g6 6f3 8s2 8p21/2 [Og] 5g7 6f2 8s2 8p21/2 [Og] 8s2 0,86(5g6 6f3 8p21/2) + 0,14(5g6 6f2 7d2 8p11/2) |
| 132 | Utb | Untribium | blok-g | [Og] 5g7 6f3 8s2 8p21/2 [Og] 5g8 6f2 8s2 8p21/2 |
| 133 | Utt | Untritrium | blok-g | [Og] 5g8 6f3 8s2 8p21/2 |
| 134 | Utq | Untriquadium | blok-g | [Og] 5g8 6f4 8s2 8p21/2 |
| 135 | Utp | Untripentium | blok-g | [Og] 5g9 6f4 8s2 8p21/2 |
| 136 | Uth | Untriheksium | blok-g | [Og] 5g10 6f4 8s2 8p21/2 |
| 137 | Uts | Untriseptium | blok-g | [Og] 5g11 6f4 8s2 8p21/2 |
| 138 | Uto | Untrioktium | blok-g | [Og] 5g12 6f4 8s2 8p21/2 [Og] 5g12 6f3 7d1 8s2 8p21/2 |
| 139 | Ute | Untrienium | blok-g | [Og] 5g13 6f3 7d1 8s2 8p21/2 [Og] 5g13 6f2 7d2 8s2 8p21/2 |
| 140 | Uqn | Unquadnilium | blok-g | [Og] 5g14 6f3 7d1 8s2 8p21/2 [Og] 5g15 6f1 8s2 8p21/2 8p23/2 |
| 141 | Uqu | Unquadunium | blok-g | [Og] 5g15 6f2 7d2 8s2 8p21/2 |
| 142 | Uqb | Unquadbium | blok-g | [Og] 5g16 6f2 7d2 8s2 8p21/2 |
| 143 | Uqt | Unquadtrium | blok-f | [Og] 5g17 6f2 7d2 8s2 8p21/2 |
| 144 | Uqq | Unquadquadium | blok-f | [Og] 5g18 6f2 7d2 8s2 8p21/2 [Og] 5g18 6f1 7d3 8s2 8p21/2 [Og] 5g17 6f2 7d3 8s2 8p21/2 [Og] 8s2 0,95(5g17 6f2 7d3 8p21/2) + 0,05(5g17 6f4 7d1 8p21/2) |
| 145 | Uqp | Unquadpentium | blok-f | [Og] 5g18 6f3 7d2 8s2 8p21/2 |
| 146 | Uqh | Unquadheksium | blok-f | [Og] 5g18 6f4 7d2 8s2 8p21/2 |
| 147 | Uqs | Unquadseptium | blok-f | [Og] 5g18 6f5 7d2 8s2 8p21/2 |
| 148 | Uqo | Unquadoktium | blok-f | [Og] 5g18 6f6 7d2 8s2 8p21/2 |
| 149 | Uqe | Unquadenium | blok-f | [Og] 5g18 6f6 7d3 8s2 8p21/2 |
| 150 | Upn | Unpentnilium | blok-f | [Og] 5g18 6f6 7d4 8s2 8p21/2 [Og] 5g18 6f7 7d3 8s2 8p21/2 |
| 151 | Upu | Unpentunium | blok-f | [Og] 5g18 6f8 7d3 8s2 8p21/2 |
| 152 | Upb | Unpentbium | blok-f | [Og] 5g18 6f9 7d3 8s2 8p21/2 |
| 153 | Upt | Unpenttrium | blok-f | [Og] 5g18 6f10 7d3 8s2 8p21/2 [Og] 5g18 6f11 7d2 8s2 8p21/2 |
| 154 | Upq | Unpentquadium | blok-f | [Og] 5g18 6f11 7d3 8s2 8p21/2 [Og] 5g18 6f12 7d2 8s2 8p21/2 |
| 155 | Upp | Unpentpentium | blok-f | [Og] 5g18 6f12 7d3 8s2 8p21/2 [Og] 5g18 6f13 7d2 8s2 8p21/2 |
| 156 | Uph | Unpentheksium | blok-f | [Og] 5g18 6f13 7d3 8s2 8p21/2 [Og] 5g18 6f14 7d2 8s2 8p21/2 |
| 157 | Ups | Unpentseptium | blok-d | [Og] 5g18 6f14 7d3 8s2 8p21/2 |
| 158 | Upo | Unpentoktium | blok-d | [Og] 5g18 6f14 7d4 8s2 8p21/2 |
| 159 | Upe | Unpentenium | blok-d | [Og] 5g18 6f14 7d5 8s2 8p21/2 [Og] 5g18 6f14 7d4 8s2 8p21/2 9s1 |
| 160 | Uhn | Unheksnilium | blok-d | [Og] 5g18 6f14 7d6 8s2 8p21/2 [Og] 5g18 6f14 7d5 8s2 8p21/2 9s1 |
| 161 | Uhu | Unheksunium | blok-d | [Og] 5g18 6f14 7d7 8s2 8p21/2 [Og] 5g18 6f14 7d6 8s2 8p21/2 9s1 |
| 162 | Uhb | Unheksbium | blok-d | [Og] 5g18 6f14 7d8 8s2 8p21/2 [Og] 5g18 6f14 7d7 8s2 8p21/2 9s1 |
| 163 | Uht | Unhekstrium | blok-d | [Og] 5g18 6f14 7d9 8s2 8p21/2 [Og] 5g18 6f14 7d8 8s2 8p21/2 9s1 |
| 164 | Uhq | Unheksquadium | blok-d | [Og] 5g18 6f14 7d10 8s2 8p21/2 |
| 165 | Uhp | Unhekspentium | blok-d | [Og] 5g18 6f14 7d10 8s2 8p21/2 9s1 |
| 166 | Uhh | Unheksheksium | blok-d | [Og] 5g18 6f14 7d10 8s2 8p21/2 9s2 |
| 167 | Uhs | Unheksseptium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 9s2 9p11/2 [Og] 5g18 6f14 7d10 8s2 8p21/2 8p13/2 9s2 |
| 168 | Uho | Unheksoktium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 9s2 9p21/2 [Og] 5g18 6f14 7d10 8s2 8p21/2 8p23/2 9s2 |
| 169 | Uhe | Unheksenium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 8p13/2 9s2 9p21/2 [Og] 5g18 6f14 7d10 8s2 8p21/2 8p33/2 9s2 |
| 170 | Usn | Unseptnilium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 8p23/2 9s2 9p21/2 [Og] 5g18 6f14 7d10 8s2 8p21/2 8p43/2 9s2 |
| 171 | Usu | Unseptunium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 8p33/2 9s2 9p21/2 [Og] 5g18 6f14 7d10 8s2 8p21/2 8p43/2 9s2 9p11/2 |
| 172 | Usb | Unseptbium | blok-p | [Og] 5g18 6f14 7d10 8s2 8p21/2 8p43/2 9s2 9p21/2 |
| 173 | Ust | Unsepttrium |  ? | [172] 6g1 [172] 9p13/2 |
...
| 184 | Uoq | Unoktquadium |  ? | [172] 6g5 7f4 8d3 |