copernicium

Also known as Cn, element 112, ununbium, Uub, ununnunium

Copernicium is a synthetic chemical element; it has symbol Cn and atomic number 112. Its known isotopes are extremely radioactive, and have only been created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of approximately 30 seconds. Copernicium was first created in February 1996 by the GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany. It was named after the astronomer Nicolaus Copernicus on his 537th anniversary.

AI overview

Copernicium is a human-made chemical element (symbol Cn, atomic number 112) that has only ever been created in laboratories and exists only in extremely unstable, radioactive forms. The element was first produced in Germany in 1996 and was named in honor of the astronomer Nicolaus Copernicus, though its most stable form lasts only about 30 seconds before decaying.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Show 6 more facts

atomic number: 112
element symbol: Uub
Commons category: Copernicium
Commons gallery: Copernicium
time of discovery or invention: 1996-00-00
Unicode character: 鎶

Sources (2)

via Wikidata · CC0

~20 min read

Article

15 sections

Contents

Introduction
History
Discovery
Naming
Isotopes
Half-lives
Predicted properties
Chemical
Physical and atomic
Experimental atomic gas phase chemistry
See also
Notes
References
Bibliography
External links

In the periodic table of the elements, copernicium is a d-block transactinide element and a group 12 element. During reactions with gold, it has been shown to be an extremely volatile element, so much so that it is possibly a gas or a volatile liquid at standard temperature and pressure.