| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | neptunium | scientific community | Neptunium is a radioactive element with no practical household use and is primarily of interest to scientists and researchers for its nuclear properties. | 1 |
| 2 | neptunium | scientific community | Highly radioactive and synthetic element used in nuclear reactors and research | 1 |