Meteorillium 317 would actually be hyphenated "Meteorillium-317" under correct format for isotopic notation. Were it to exist, it would have a significantly greater atomic mass number than the heaviest known nuclides today, ununseptium-294 (Uus-294) and ununoctium-294 (Uuo-294). It would most likely have to be placed in a new row of the periodic table, and its electrons would probably extend into the theoretical g block of orbitals.