bn:01874983n
Noun Concept
Categories: Isotopes of neptunium, Neptunium, Lists of isotopes by element
EN
isotope of neptunium  isotopes of neptunium  Neptunium-219  Neptunium-220  Neptunium-223
EN
Neptunium is usually considered an artificial element, although trace quantities are found in nature, so a standard atomic weight cannot be given. Wikipedia
Definitions
Relations
Sources