The section in the middle of the table is called the Transition Metals ... group 0 are unreactive non-metals. The zigzag, staircase, line in the diagram of the periodic table above separates ...

How is the table organized? The Periodic Table, first compiled by Russian chemist Dmitri Mendeleyev, is organized by the number of protons in the nucleus of each element's atom, known as the ...

Ram Mohan looks at how bismuth — a remarkably harmless element among the toxic heavy metals in the periodic table — has sparked interest in areas varying from medicinal to industrial chemistry.