| This article is about an undiscovered element. Once it is discovered, this article will be edited with more information. |
Unsepttrium is a hypothetical superheavy eka-superactinide with the symbol Ust and atomic number 173. If it exists, it will be the first one of the tenth period and the first eka-superactinide. Many scientists theorize that if the formula for Bohr models is correct, element 173 will be the last element. The equation simply doesn't allow for elements that have a proton count higher than 173 (173.036).
| Period 10 elements | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 10 | 173 Ust | 174 Usq | 175 Usp | 176 Ush | 177 Uss | 178 Uso | 179 Use | 180 Uon | 181 Uou | 182 Uob | 183 Uot | 184 Uoq | 185 Uop | 186 Uoh | 187 Uos | 188 Uoo | 189 Uoe | 190 Uen | 191 Ueu | 192 Ueb | 193 Uet | 194 Ueq | 195 Uep | 196 Ueh | 197 Ues | 198 Ueo | 199 Uee | 200 Bnn | 201 Bnu | 202 Bnb | 203 Bnt | 204 Bnq | 205 Bnp | 206 Bnh | 207 Bns | 208 Bno | 209 Bne | 210 Bun | 211 Buu | 212 Bub | 213 But | 214 Buq | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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