The colors of rubies and emeralds are so striking that they define shades of red and green – ruby red and emerald green. But ...

Can France claim the first periodic table? Probably not ... These elements were almost entirely main group elements, but in 1868 he incorporated the transition metals in a much more developed table.

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...

One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including ...

After a breakdown in US-Russia relations, Riken finds itself ahead of its rivals. And Lawrence Berkeley National Laboratory chases element 120 ...

Then in 1869, a Russian scientist called Dmitri Mendeleev produced one of the first practical periodic ... of the table is called the Transition Metals. If you know what one of the elements ...