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.
Battle of Dunkirk. The Battle of Dunkirk was a military operation that took place in Dunkirk (Dunkerque), France, during the Second World War. The battle was fought between the Allies and Nazi Germany. As part of the Battle of France on the Western Front, the Battle of Dunkirk was the defence and evacuation to Britain of British and other Allied forces in Europe from 26 May to 4 June 1940. After the Phoney War, the Battle of France began in earnest on 10 May 1940. To the east, the German Army Group B invaded the Netherlands and advanced westward.