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.
How and why did World War 2 start? The Treaty of Versailles may have set the scene, but WW2's main progenitor was one man: Adolf Hitler. Most historians of the causes of World War 2 agree that its seeds were sown at the end of World War 1. How did the First World War start? In 1918, the War Guilt Clause of the Treaty of Versailles held Germany and Austria-Hungary responsible for the entire conflict and imposed on them crippling financial sanctions, territorial dismemberment and isolation.