Ununbium
Ununbium, now known as Copernicium (Cn), is a synthetic element with the atomic number 112. It was first created in 1996 by a team of scientists at the GSI Helmholtz Centre for Heavy Ion Research in Germany. This element is highly unstable and has a very short half-life, making it difficult to study.
As a member of the group 10 elements in the periodic table, ununbium is expected to share some properties with its lighter homologs, such as Platinum and Palladium. However, due to its instability, much about its chemical behavior remains unknown.