The least electronegative element is cesium (0.79 on the Pauling scale and left in the second row from the bottom in the periodic table). Note that older texts list both francium and cesium as least ...

Gethin: Francium. That's not an element that you ... and are placed in the first vertical column on the left of the periodic table. All the Group 1 elements are very reactive, and all react ...

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 ...