Neptunium is a chemical element; it has symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element. It is...

Neptunium (93Np) is usually considered an artificial element, although trace quantities are found in nature, so a standard atomic weight cannot be given...

Neptunium nitride is a binary inorganic compound of neptunium and nitrogen with the chemical formula NpN. Neptunium nitride can be prepared by the reaction...

Neptunium tetrachloride is a binary inorganic compound of neptunium metal and chlorine with the chemical formula NpCl4. The compound can be prepared from...

neutrinos, is 42.6 MeV. The 4n + 1 chain of neptunium-237 is commonly called the "neptunium series" or "neptunium cascade". In this series, only two of the...

Neptunium tetrabromide is a binary inorganic compound of neptunium metal and bromine with the chemical formula NpBr4. The compound can be prepared from...

Neptunium monocarbide is a binary compound of neptunium metal and carbon with the chemical formula NpC. Heating of freshly obtained neptunium hydride...

Neptunium fluoride may refer to: Neptunium(III) fluoride, NpF3 Neptunium(IV) fluoride, NpF4 Neptunium(V) fluoride, NpF5 Neptunium(VI) fluoride, NpF6 This...

Like plutonium, neptunium has a high affinity for soil. However, it is relatively mobile over the long term, and diffusion of neptunium-237 in groundwater...

but the valence +4 is preferred in solid neptunium compounds. Neptunium metal is very reactive. Ions of neptunium are prone to hydrolysis and formation of...