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, which is 8 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Oganesson: frequently asked questions
- What is Oganesson?
- Oganesson (Og) is the chemical element with atomic number 118. It is not yet firmly classified; it is listed as "unknown, predicted to be noble gas".
- What is the atomic number of Oganesson?
- Oganesson's atomic number is 118, which means every Oganesson atom has 118 protons in its nucleus.
- What is the electron configuration of Oganesson?
- The electron configuration of Oganesson is 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). Its electrons are arranged in shells of 2, 8, 18, 32, 32, 18, 8, with 8 in the outermost shell.
- Is Oganesson a metal or a nonmetal?
- Oganesson is not yet firmly classified; it is listed as "unknown, predicted to be noble gas".
- What group and period is Oganesson in?
- Oganesson is in group 18 and period 7 of the periodic table.
- Is Oganesson a solid, liquid, or gas?
- At room temperature, Oganesson is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.