Cn-103 is a synthetic element with the atomic number 103. It is part of the actinide series and is classified as a transuranium element, meaning it is heavier than uranium. Cn-103 is highly radioactive and has a very short half-life, making it difficult to study. It was first synthesized in 1971 by a team of scientists at the Lawrence Berkeley National Laboratory. Due to its instability, Cn-103 does not have significant practical applications and is primarily of interest for research purposes. Its discovery contributes to the understanding of the properties of heavy elements and the behavior of atomic nuclei.