Seaborg appeared as a guest on NBC's Quiz Kids show, where one of the participants asked him if they had produced any other new elements as well as plutonium and neptunium. As Seaborg was due to ...

Americium is gradually decaying to become another element 'called neptunium. 'Neptuniam atoms are much more stable. JON CHASE:'As more and more of the atoms become neptunium, 'the material becomes ...