Assertion: neptunium | /r/PartOf | the actinide series
Facets:
Source sentences:
text: A silvery radioactive metallic element, neptunium is the first transuranic element and belongs to the actinide series.
text: Neptunium is the first transuranic element and belongs to actinide series.
text: Neptunium (chemical symbol Np, atomic number 93) is a silvery radioactive metallic element, belonging to the actinide series.
text: A silvery radioactive metallic element, neptunium is the first transuranic element and belongs to the actinide series.
text: A silvery radioactive metallic element, neptunium is the first transuranic element and belongs to the actinide series.