renium
Reinum is a chemical element with the atomic number 75 and the symbol Rf. It is a synthetic, radioactive, and highly unstable element that belongs to the group 7 of the periodic table.
Reinum was first synthesized in 1969 by Soviet physicists at the Joint Institute for Nuclear Research in
Reinum has an atomic mass ranging from 260 to 294, depending on the specific isotope. Due to
In terms of physical properties, reinum exists as a post-transition metal and has not been isolated in
Reinum was officially recognized as an element by the IUPAC (International Union of Pure and Applied Chemistry)