#wikipedia.org. neptunium. 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 named after Neptune, the planet beyond Uranus in the Solar System, which uranium is named after. A neptunium atom has 93 protons and 93 electrons, of which seven are valence electrons. Neptunium meta
#Business #Science #commodities market
Filter: #2025-02-24 × #nil ×
Showing 1-1 of 1 item - Time: 0.14 s. Memory: 15.3576 mb.