Oganesson (Og)

Oganesson is a chemical element of the periodic table with chemical symbol Og and atomic number 118 with an atomic weight of 294 u and is classed as unknown and is part of group 18 (noble gases). Oganesson is solid at room temperature.

Tennessine Periodic table Hydrogen

Oganesson in the periodic table

Symbol	Og
Atomic number	118
Group	18 (Noble gases)
Period	7
Block	p
Classification	Unknown

Appearance	-
Color	-

Number of protons	118 p⁺
Number of neutrons	176 n⁰
Number of electrons	118 e^-

From Wikipedia, the free encyclopediaOganesson 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.

Physical properties

Phase at STP	Solid
Density	4.95 g/cm³
Atomic weight	294 u

Thermal properties

Melting point	-
Boiling point	350 K 76.85 °C 170.33 °F
Heat of vaporization	-

Atomic properties

Electronegativity (Pauling Scale)	-
Electron affinity	5.40318 kJ/mol
Oxidation states	−1), (0), (+1), (+2), (+4), (+6) (predicted)
Ionization energies	860.1 kJ/mol 1560 kJ/mol

Electron configuration for oganesson

Electron configuration

Shorthand configuration

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶

Electron configuration

Full configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁶

Electron configuration chart

1s²
2s²	2p⁶
3s²	3p⁶	3d¹⁰
4s²	4p⁶	4d¹⁰	4f¹⁴
5s²	5p⁶	5d¹⁰	5f¹⁴
6s²	6p⁶	6d¹⁰
7s²	7p⁶

Electrons per shell

2, 8, 18, 32, 32, 18, 8

Valence electrons

Valency electrons

Bohr model

Figure: Shell diagram of Oganesson (Og) atom.

Orbital Diagram

1s

2s

2p

3s

3p

3d

4s

4p

4d

4f

5s

5p

5d

5f

6s

6p

6d

7s

7p

The history of Oganesson

Discovery

Joint Institute for Nuclear Research, Lawrence Livermore National Laboratory (2002)

Discovery of oganesson

It was first synthesized in 2002 at the Joint Institute for Nuclear Research (JINR) in Dubna, near Moscow, Russia, by a joint team of Russian and American scientists. In December 2015, it was recognized as one of four new elements by the Joint Working Party of the international scientific bodies IUPAC and IUPAP. It was formally named on 28 November 2016.[14][15] The name honors the nuclear physicist Yuri Oganessian, who played a leading role in the discovery of the heaviest elements in the periodic table. It is one of only two elements named after a person who was alive at the time of naming, the other being seaborgium, and the only element whose eponym is alive today.

Periodic table history

Identifiers

List of unique identifiers for Oganesson in various chemical registry databases

CAS Number	54144-19-3
ChemSpider ID	-
EC number	-
PubChem CID Number	-