The periodic table, also called the periodic ... Mendeleev's book dealt with just eight of the known elements — carbon, hydrogen, oxygen, nitrogen, chlorine, fluorine, bromine and iodine ...

The periodic table is a well-organized chart that contains all the known elements in the universe. These elements are ...

Can France claim the first periodic table? Probably not, but a French Geology Professor made ... but Mendeleev saw that iodine was very similar to the rest of the halogens (fluorine, chlorine, bromine ...

The periodic table's most electronegative element is fluorine (3.98 on the Pauling scale and top right in the periodic table). The least electronegative element is cesium (0.79 on the Pauling scale ...

and all the elements in group 0 are unreactive non-metals. The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right.

Fluorine's name derives from fluorspar — or fluorite, CaF 2 (pictured) — which in earlier times was used as a flux to facilitate smelting. As early as the seventeenth century, fluorspar was ...