Elements in the periodic table are grouped as metals, metalloids or semimetals, and nonmetals. The metalloids separate the metals and nonmetals on a periodic table. Also, many periodic table have a stair-step line on the table identifying the element groups.
Quick Facts. Background. The Second Battle of the Marne marked the turning of the tide in World War I. It began with the last German offensive of the conflict and was quickly followed by the first allied offensive victory of 1918.
With the failure of the German offensive against France at the Battle of the Marne, and the allied counter-offensive, the so-called ' race to the sea ' began, a movement towards the North Sea coast as each army attempted to out-flank the other by moving progressively north and west.