fusion" of: 15.08%  plutonium , 18.06%  tantalum , 27.71%  xenon , 24.02%  promethium , 10.62% dialium (which is a plant genus, not an element), 3.94%  mercury , with the last 0.57% being an unknown element not found on the  periodic table . The substitution of tar (which Gorman used after glancing