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118
Og
294

Oganesson

engelsk: Oganesson
Ædelgasser Gruppe 18 Periode 7 Blok p

Oganesson er et kemisk grundstof i det periodiske system med kemisk symbol Og og atomnummer 118 med en atomvægt på 294 u og er klassificeret som ædelgasser og er en del af gruppen 18 (ædelgasser). Oganesson er fast ved stuetemperatur.

Oganesson i det periodiske system

SymbolOg
Atomnummer118
Gruppe18 (Ædelgasser)
Periode7
Blokp
KlassifikationÆdelgasser
Udseende-
Farve-
Antal protoner118 p+
Antal neutroner176 n0
Antal elektroner118 e-
Fra Wikipedia, den gratis encyklopædiOganesson (tidl. også eka-radon og ununoctium) er det 118. grundstof i det periodiske system, med det kemiske symbol Og Denne radioaktive ædelgas (om end stoffet formodentlig ikke er en gasart ved normale tryk- og temperaturforhold) findes ikke i naturen, men kan syntetiseres i uhyre beskedne mængder ad gangen i laboratorier.

Fysiske egenskaber

Fase ved STPFast
Massefylde4.95 g/cm3
Atommasse294 u

Thermal properties

Smeltepunkt-
Kogepunkt350 K
76.85 °C
170.33 °F
Fordampningsvarme-

Atomiske egenskaber

Elektronegativitet (Pauling Scale)-
Elektronaffinitet5.40318 kJ/mol
Oxidationstrin−1), (0), (+1), (+2), (+4), (+6)
(predicted)
Ioniseringsenergier
  1. 860.1 kJ/mol
  2. 1560 kJ/mol

Elektronkonfiguration for oganesson

Elektronkonfiguration
Kortfattet konfiguration
[Rn] 5f14 6d10 7s2 7p6
Fuld konfiguration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6
Elektronkonfigurationsdiagram
1s2
2s22p6
3s23p63d10
4s24p64d104f14
5s25p65d105f14
6s26p66d10
7s27p6
Elektroner pr. Skal2, 8, 18, 32, 32, 18, 8
Valenselektroner 8
Valency-elektroner
Bohrs atommodel
OganessonElectron shell for Oganesson, created by Injosoft ABOg
Figur: Skaldiagram af Oganesson (Og) atom.
Orbital diagram
1s
2s2p
3s3p3d
4s4p4d4f
5s5p5d5f
6s6p6d
7s7p

The history of Oganesson

OpdagetJoint Institute for Nuclear Research, Lawrence Livermore National Laboratory (2002)
Navngivet afJINR, LLNL
Opdagelse af 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.
Original wordOganessian
Language of origin English
Name sourcePerson
Meaning“Yuri Oganessian”
Naming
The element is named in honour of Yuri Oganessian, the Armenian-Russian physicist who led much of the recent transactinide research at JINR.

Identifikatorer

List of unique identifiers for Oganesson in various chemical registry databases
CAS Number54144-19-3
ChemSpider ID-
EC number-
PubChem CID Number-