Rhenium
71Ida Noddack — (25 February 1896 1978), née Ida Tacke, was a German chemist and physicist. She was among the first physicists to propose nuclear fission. With her husband Walter Noddack she discovered element 75 Rhenium. Background Ida Noddack was born in Wesel …
72Entdeckung der Kernspaltung — Kernspaltung des Uranatoms: Sonderbriefmarke der Deutschen Bundespost von 1979 …
73Masurium — Eigenschaften …
74Métaux réfractaires — H   He Li Be   B C N O F Ne Na Mg   Al Si P S Cl Ar K Ca Sc   Ti V Chrome Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y …
75Group 7 element — Group → 7 ↓ Period 4 25 Mn 5 …
76Gruppe-7-Element — …
77Bohrium — (pronEng|ˈbɔəriəm) is a chemical element in the periodic table that has the symbol Bh and atomic number 107.It is a synthetic element whose most stable isotope, Bh 270, has a half life of 61 seconds. Chemical experiments confirmed bohrium s… …
78Technetium — molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re …
79Mangangruppe —     …
80Technetium — Eigenschaften …