Ununseptium
Ununseptium is the temporary name of an undiscovered chemical element in the periodic table that has the temporary symbol Uus and has the atomic number 117. It is expected to decay by alpha decay to element 115.
| General | |
|---|---|
| Name, Symbol, Number | ununseptium, Uus, 117 |
| Chemical series | presumably halogens |
| Group, Period, Block | 17, 7, p |
| Appearance | unknown, probably dark metallic |
| Standard atomic weight | unknown g·mol-1 |
| Electron configuration | perhaps [Rn] 5f14 6d10 7s2 7p5 (guess based on astatine) |
| Electrons per shell | 2, 8, 18, 32, 32, 18, 7 |
| Phase | presumably a solid |
| CAS registry number | 87658-56-8 |
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