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.
On June 28, 1919, the Treaty of Versailles was signed, officially ending World War I. Under Article 231 of the Treaty of Versailles, Germany was forced to accept responsibility for the war and its damage. This section is often called the 'War Guilt Clause.'.