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| Predicted properties | |||||
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| Name, Symbol, Number | Ununseptium, Uus, 117 | ||||
| Chemical series | Presumably Halogens | ||||
| Group, Period, Block | 17, 7 , p | ||||
| Appearance | unknown, but probably metallic and dark in appearance | ||||
| Atomic weight | [291] amu(A Guess) | ||||
| Electron configuration | [Rn] 5f14 6d10 7s27p5 (a guess based upon astatine) | ||||
| e- 's per energy level | 2, 8, 18, 32, 32, 18, 7 | ||||
| State of matter | presumably a solid | ||||
History
Ununseptium has not yet been discovered as yet.
The name Ununseptium is used as a placeholder, such as in scientific articles about the search for Element 117; it is a Latinateate way of saying "one-one-seven-ium" ("ium" being a standard ending for element names).Its properties will be similar to the halogens, most notably astatine, as it is placed in Group 17 of the elements. Such transuranic elements are always artificially produced, and usually end up being named for a scientist. See Element naming controversy, systematic element name.