| The new elements were named neptunium and plutonium, respectively. |
| The waste also contains radioactive isotopes of the transuranic elements neptunium, americium, and curium. |
| They produced neptunium, which decayed by beta emission, shunting the element one place further along the Periodic Table. |
| Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table. |
| Another option is that of partitioning and the transmutation of the long-lived actinides, americium, curium and neptunium. |
| West Lake's thorium-230 and actinium-227 have been ranked along with plutonium, americium and neptunium as among the most radioactively dangerous materials known. |
