Bohrium is a synthetic element with the symbol Bh and atomic number 107. It is part of the transition metals group in the periodic table and was first synthesized in 1976 by a team of scientists in Russia and America. Bohrium is highly radioactive and has no stable isotopes, making it difficult to study. Due to its short half-life, which is measured in seconds, Bohrium is not found naturally and must be created in a laboratory setting. Its chemical properties are not well understood, but it is expected to behave similarly to other elements in the group 7 of the periodic table, such as rhenium.