118 Og 294
Oganesson
unknown, predicted to be noble gas
Properties
- Atomic number
- 118
- Atomic mass
- 294 u
- Category
- unknown, predicted to be noble gas
- Group
- 18
- Period
- 7
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 8
- Electronegativity
- —
- Density
- 4.95 g/cm³
- Melting point
- —
- Boiling point
- 76.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁶
Noble-gas shorthand: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Electrons per shell: 2, 8, 18, 32, 32, 18, 8 — that's 8 in the outermost shell.
About Oganesson
Oganesson is IUPAC's name for the transactinide element with the atomic number 118 and element symbol Og. It is also known as eka-radon or element 118, and on the periodic table of the elements it is a p-block element and the last one of the 7th period. Oganesson is currently the only synthetic member of group 18.
- Discovered by Joint Institute for Nuclear Research
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.