Suchergebnisse
Suchergebnisse:
Vor einem Tag · German chemists Walter Noddack, Otto Berg, and Ida Tacke reported the discovery of element 75 and element 43 in 1925, and named element 43 masurium (after Masuria in eastern Prussia, now in Poland, the region where Walter Noddack's family originated).
Vor einem Tag · Neptunium is a hard, silvery, ductile, radioactive actinide metal. In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium. [7] Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [8]
