The element with the atomic number 103 is named Lawrencium. Its chemical symbol is Lr. It is a radioactive element that belongs to the actinide series. Lawrencium was first synthesized in 1961 at the University of California, Berkeley. It is named after Ernest Lawrence, who invented the cyclotron, a particle accelerator used to create new elements. Lawrencium is a very rare element and has only been produced in very small amounts. It is used for research purposes only.