noun
- Plural of neptunium; atoms or samples of the chemical element neptunium (Np, atomic number 93), a radioactive actinide metal.
Usage: chemistry; technical
Examples
- Neptuniums are produced in nuclear reactors as byproducts of uranium fission.
- The laboratory stored several neptuniums isotopes for research purposes.
- Scientists study neptuniums to understand the behavior of transuranium elements.
- Neptuniums-237 is the most stable isotope of neptunium.