Definition of the Neptunium Element
A radioactive metallic element that is chemically similar to uranium and is obtained in nuclear reactors as a by-product in the production of plutonium. Chemically, Neptunium is extremely reactive and is attacked by Oxygen, steam and acids, but not by alkalis. The Atomic Number of this element is 93 and the Element Symbol is Np.
Origin / Meaning of the name Neptunium
Neptunium was named for the planet Neptune because it is the next outer-most planet beyond the planet Uranus in the solar system and this element is the next one beyond uranium in the periodic table.
Facts about the Discovery and History of the Neptunium Element
Neptunium was discovered by Edwin McMillan and Philip Abelson in the USA in 1940
History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.
Occurrence of the Neptunium Element
Abundances of the element in different environments
% in Universe N/A
% in Sun None
% in Meteorites None
% in Earth's Crust None
% in Oceans None
% in Humans None
Associated Uses of Neptunium
Neutron detection equipment