Oganesson, 118OgOganesson |
---|
Pronunciation | (OH-gə-NES-ən[1]) |
---|
Alternative names | element 118, eka-radon |
---|
Mass number | [294] |
---|
Oganesson in the periodic cairt |
---|
|
Rn ↑ Og ↓ (Usb)
|
tennessine ← oganesson → ununennium
|
| |
Atomic nummer (Z) | 118 |
---|
Group | group 18 |
---|
Period | period 7 |
---|
Block | p-block |
---|
Element category | Unkent chemical properties |
---|
Electron confeeguration | [Rn] 5f14 6d10 7s2 7p6 (predictit)[2][3] |
---|
Electrons per shell | 2, 8, 18, 32, 32, 18, 8 (predictit) |
---|
Pheesical properties |
---|
Phase at STP | solit (predicted)[2] |
---|
Bylin pynt | 350±30 K (80±30 °C, 170±50 °F) (extrapolatit)[2] |
---|
Density when liquid (at m.p.) | 4.9–5.1 g/cm3 (predictit)[4] |
---|
Creetical pynt | 439 K, 6.8 MPa (extrapolatit)[5] |
---|
Heat o fusion | 23.5 kJ/mol (extrapolatit)[5] |
---|
Heat o vapourisation | 19.4 kJ/mol (extrapolatit)[5] |
---|
Atomic properties |
---|
Oxidation states | (−1),[3] (0), (+1),[6] (+2),[7] (+4),[7] (+6)[3] (predicted) |
---|
Ionisation energies | - 1st: 839.4 kJ/mol (predictit)[3]
- 2nd: 1563.1 kJ/mol (predictit)[8]
-
|
---|
Covalent radius | 157 pm (predictit)[9] |
---|
Ither properties |
---|
Naitural occurrence | synthetic |
---|
CAS Nummer | 54144-19-3[10] |
---|
History |
---|
Namin | IUPAC seestematic element name |
---|
Diskivery | Jynt Institute for Nuclear Research an Lawrence Livermore Naitional Laboratory (2002) |
---|
Main isotopes o oganesson |
---|
|
| references |
Oganesson is a superhivy airtifeecial chemical element wi an atomic nummer o 118 an a seembol o Og.
It wis recognised bi the International Union of Pure and Applied Chemistry in Januar 2016. It is cried efter Yuri Oganessian, a Russian physicist that wis ahint the discovery o flerovium.[12]