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 biggest negative effect of the Treaty of Versailles was on Germany. The treaty helped lead to German problems in at least two ways. Economically, it saddled Germany with a huge debt in the form of war reparations. This forced Germany to borrow money from the United States in order to pay.