Copernicus. Called ununbium as a temporary name, it is a chemical element of the periodic table whose symbol is Cn (formerly Uub) and its atomic number 112. Physical space is not yet known, but it could be done, knowing that for now the known isotope , 285 of Atomic mass , it has a half-life of about 0.24 milliseconds.


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  • 1 History
    • 1 Features
    • 2 Nomenclature
    • 3 Physical properties
    • 4 Atomic properties
    • 5 Obtaining
    • 6 Isotopes
    • 7 Curiosities
    • 8 Effects on health and the environment
  • 2 Sources


New chemical element discovered for science in an ephemeral way, only existed for 1 second, by a team led by Professor Hofmann, on February 9, 1996. They used an accelerator 100 meters long, they shot zinc ions in a sheet of lead. The fusion of the atomic nucleus of the two elements produced an atom of the new element 112.

This atom was only stable for one second, but scientists were able to identify it by measuring the alpha particles emitted during the atom’s decay with the help of highly sensitive analytical procedures.

Independent experiments confirmed the discovery of the element. In 2009 the IUPAC officially recognized its existence as member 112 of the periodic table of chemical elements, so they invited the GSI, the center where it was discovered, to officially baptize it.

Copernicium is the chosen name, and its chemical symbol will be Cn. Copernican is 227 heavier than hydrogen, making it the heaviest of all known chemical elements. The name in honor of Copernicus follows the tradition of naming chemical elements after eminent scientists.

German scientists managed to include element number 112 in the periodic table. It is a super heavy chemical element that was called ununbium at the time, which is Latin for “one one two.” This element, which was actually discovered in 1996, is thus confirmed its existence, although they have only managed to produce literally four atoms of it.


Copernicium is 277 times heavier than hydrogen and holds the record for being the heaviest on the periodic table. This last natural element on the periodic table (copernicium) was discovered in 1925; since then all the others have been, like 112, created in the laboratory.


In July 2009, the group of Professor Sigurd Hofmann proposed the name Copernicus and the symbol Cp in honor of the scientist and astronomer Nicolás Copernicus (1473-1543). After the proposal, six months pass until the IUPAC makes the name official, in order to allow that time for the scientific community to discuss the suggested name, before granting the official name. However, the possible symbol Cp was changed to Cn, since the symbol was formerly associated with cassiopium (whose official name is Lutetium [Lu]); and, furthermore, in organic chemistry there is already the symbol Cp, which indicates cyclopentadiene. Therefore, on February 19, 2010 IUPAC officially exposed the designation and symbol of element 112

Physical properties

Copernicium is a chemical element of unknown appearance, probably a silvery white or gray metallic and belongs to the group of transition metals. The atomic number of copernicium is 112. The chemical symbol for copernicium is Cn. The state of copernicium in its natural form is unknown, presumably solid. Copernicium is very hard, has high boiling and melting points, and is a good conductor of electricity and heat.

Atomic properties

The electron configuration of the copernicium is [Rn] 5f14 6d10 7s2 an assumption based on Mercury . The atomic mass of copernicium is 285 u.


Hofmann and his team were able to produce for the first time Copernicium at GSI 9 February 1996. Using the 100 meters of the large accelerator GSI (particle accelerator), firing ions of zinc on a sheet of lead . The fusion of the atomic nuclei of both elements produced an atom of the new element 112. However, the atom was only stable for a fraction of a second.


The best-known isotope , with an atomic mass of 285, has a half-life of about 0.24 milliseconds.


Just as Pluto recently lost its status as a planet, didymium, a supposed chemical element, had its own epic (and its five minutes of fame, since it was even listed on the periodic table). But fame is fleeting, and didymium, like so many others, sank, if not into oblivion in the variegated and perhaps sad world of compound elements, on the other hand the copernicium managed to be accepted according to the concept of chemical element enunciated by the British John Dalton which consists in that a substance cannot be decomposed, by chemical reaction, in other simpler ones.


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