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.
By the next day, the counterattack was total. More than two million soldiers fought in the Battle of the Marne, and 100,000 of them were killed or wounded. On September 9, the exhausted Germans began a fighting retreat to the Aisne River.