Home » Various facts about Oganesson

Various facts about Oganesson

by chemdude71


Oganesson is a synthetic chemical element with the symbol Og
Element 118 was named after Yuri Oganessian, a pioneer in the discovery of synthetic elements

Oganesson atomic number is 118
Oganesson has the highest atomic number and highest atomic mass of all known elements.
It was first synthesized in 2002 at the Joint Institute for Nuclear Research in Russia
On the periodic table of the elements it is a p-block element
It is the last element of period 7.

Oganesson has one known isotope, 294Og, with a half-life of about 0.89 milliseconds.
The group of Oganesson in the periodic table is 18 because it is a noble gas.

Its properties are unknown since only a few of its atoms have been artificially produced.
The boiling point of Oganesson is 450K to 465K
The melting point of Oganesson lies between 325K to 340K
The radioactive oganesson atom is very unstable, and only at most six atoms of the isotope oganesson-294 have been detected

Oganesson has more than 86 electrons in the valence shell
It belongs to the island of stability concept, which is a hypothetical area with longer-lived isotopes of superheavy elements.

Oganesson is one of only two elements named after a person living at the time of naming. The other element is seaborgium.
It may be significantly reactive





Appearance metallic (predicted)
Mass number [294]
Oganesson in the periodic table
Atomic number (Z) 118
Group group 18 (noble gases)
Period period 7
Block   p-block
Electron configuration [Rn] 5f14 6d10 7s2 7p6 (predicted)
Electrons per shell 2, 8, 18, 32, 32, 18, 8 (predicted)
Physical properties
Phase at STP solid (predicted)
Melting point 325 ± 15 K ​(52 ± 15 °C, ​125 ± 27 °F) (predicted)
Boiling point 450 ± 10 K ​(177 ± 10 °C, ​350 ± 18 °F) (predicted)
Density (near r.t.) 7.2 g/cm3 (solid, 319 K, calculated)
when liquid (at m.p.) 6.6 g/cm3 (liquid, 327 K, calculated)
Atomic properties
Oxidation states (−1),[4] (0), (+1),[6] (+2),[7] (+4),[7] (+6)[4] (predicted)
Ionization energies
  • 1st: 860 kJ/mol (calculated)
  • 2nd: 1560 kJ/mol (calculated)
Atomic radius empirical: 152 pm (predicted)
Covalent radius 157 pm (predicted)
Other properties
Natural occurrence synthetic
Crystal structure ​face-centered cubic (fcc)
CAS Number 54144-19-3
Naming after Yuri Oganessian
Prediction Hans Peter Jørgen Julius Thomsen (1895)
Discovery Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory (2002)
Main isotopes[12] Decay
abun­dance half-life (t1/2) mode pro­duct
294Og synth 0.7 ms[13][14] α 290Lv

You may also like

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Adblock Detected

Please support us by disabling your AdBlocker extension from your browsers for our website.