A team at Oak Ridge National Laboratory led by Charles Coryell discovers chemical element 61 which they will name promethium .
Chemical element 61 is the only one still missing between 1 and 96 on the periodic table .
A team at Oak Ridge National Laboratory led by Charles Coryell discovers chemical element 61 , the only one still missing between 1 and 96 on the periodic table , which they will name promethium .