Covalent compounds can be subdivided into polar and no polar compounds. In water, a polar molecule, the hydrogen electrons are not shared equally with the oxygen atoms; this results in a polar bond. Oxygen due to it's greater electro negativity pulls the electrons closer to its nucleus.
The Treaty of Versailles was the main causes of World War II due to the following reasons,Germany had to pay back 33 billion after WWI and forced to accept sole blame for the war in order to justify the reparations.
The immediate cause was Britain and France declaring war on Germany after it invaded Poland in September 1939. Problems arose in Weimar Germany that experienced strong currents of revanchism after the Treaty of Versailles that concluded its defeat in World War I in 1918.ome long-term causes of World War II are found in the conditions preceding World War I and seen as common for both World Wars.