118Og294.000
Noble Gasp-blockRadioactivePredicted properties
Oganesson
Element 118 on the periodic table, symbol Og, group 18, period 7.
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.
Properties
- Atomic Number
- 118
- Atomic Mass
- 294.0000 u
- Group
- 18
- Period
- 7
- Block
- p-block
- Category
- Noble Gas
- State at 25 °C
- Solid
- Melting Point
- Not measured
- Boiling Point
- 350 K · 76.9 °C
- Density
- 4.95 g/cm³
- Atomic Radius
- Not measured
- Electronegativity
- Not measured
- Oxidation States
- None commonly seen
- Abundance in Crust
- Vanishingly rare
- Discovered
- 2002
- Discovered By
- Joint Institute for Nuclear Research
Electron Configuration
*[Rn] 5f14 6d10 7s2 7p6
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6
Elements near Oganesson
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.