Ununoctium — Element 118

Ununoctium (element 118, symbol Uuo) has been created by a lab in Russia, as part of a joint U.S.-Russia project. They created three atoms of ununoctium-294 by colliding nuclei of californium-249 with nuclei of calcium-48:

I’ve already added it to my classroom periodic table:


  • The creation of Uuo has been announced before. In 1999, a team of American scientists announced that they had synthesized this element, only to have other scientists pick their evidence apart.
  • I haven’t seen this reported on news sites yet; I’m not sure why not. It is on the Wikipedia home page today, with the article on ununoctium giving more details. Being that anyone can edit a Wikipedia article, this left me a little sceptical until I found the news release from the Lawrence Livermore National Laboratory online.
  • The name “ununoctium” is a temporary name meaning 1-1-8. It may take years for a decision to be made on its official name and symbol.


Webelements page on ununoctium — gives the story of the retracted 1999 creation of ununoctium
Wikipedia article on ununoctium

Lawrence Livermore National Laboratory press release

Joint Institute for Nuclear Research, Dubna, Russia

Grace and Peace

One thought on “Ununoctium — Element 118

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s