Isobars are atoms that have same atomic mass but different atomic number. They have different atomic numbers because they have different numbers of protons. They have the same atomic mass because they have just enough neutrons to make the same total of nucleons. Isobars occur at different places in the Periodic Table.
The Holocaust (also called Ha-Shoah in Hebrew) refers to the period from January 30, 1933 - when Adolf Hitler became chancellor of Germany - to May 8, 1945, when the war in Europe officially ended.
Quick Answer. Word War II began in Europe on September 1, 1939, and ended on May 8, 1945. The beginning of the war was marked by the German invasion of Poland, while the end is considered to be Germany's unconditional surrender. Continue Reading.