Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...

When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese. In the early twentieth century, several claims were made ...

Eric Scerri explains. Rhenium lies two places below manganese in group 7 of the periodic table and its existence was predicted by Mendeleev in 1869. In fact, when his periodic system was first ...

Chromium Transition elements 1890°C 7.19 g/cm 3 Manganese Transition elements 1240°C 7.20 g/cm 3 Iron Transition elements 1538°C 7.87 g/cm 3 Cobalt Transition elements 1492°C 8.90 g/cm 3 Nicke ...