← Periodic table Glenn T. Seaborg 1912–1999 United States chemist Linked elements 94 Plutonium (Pu) 95 Americium (Am) 96 Curium (Cm) 97 Berkelium (Bk) 98 Californium (Cf) 101 Mendelevium (Md) 106 Seaborgium (Sg)