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| Appearance |
| Unknown |
| General |
| Name, symbol, number |
ununoctium, Uuo, 118 |
| Element category |
Unknown |
| Group, period, block |
18, 7, p |
| Standard atomic weight |
(294) g·mol−1 |
| Electron configuration |
[Rn] 5f14 6d10 7s2 7p6[1] |
| Electrons per shell |
2, 8, 18, 32, 32, 18, 8[1] (Image) |
| Physical properties |
| Phase |
Unknown |
| Density (near r.t.) |
(predicted) 13.65[2] g·cm−3 |
| Boiling point |
(extrapolated) 320–380[1] K, 50–110 °C, 120–220 °F |
| Critical point |
(extrapolated) 439[3] K, 6.8[3] MPa |
| Heat of fusion |
(extrapolated) 23.5[3] kJ·mol−1 |
| Heat of vaporization |
(extrapolated) 19.4[3] kJ·mol−1 |
| Atomic properties |
| Oxidation states |
0[4], +2[5], +4[5] |
| Ionization energies |
1st: (calc.) 820–1130[1] kJ·mol−1 |
| 2nd: (extrapolated) 1450[6] kJ·mol−1 |
| Atomic radius |
(predicted) 152[2] pm |
| Covalent radius |
(extrapolated) 230[6] pm |
| Miscellaneous |
| Crystal structure |
Unknown |
| CAS registry number |
54144-19-3[7] |
| Most stable isotopes |
| Main article: Isotopes of ununoctium |
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