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.
Image copyright Other. The Holocaust was the mass murder of six million Jews and millions of other people leading up to, and during, World War II. The killings took place in Europe between 1933 and 1945. They were organised by the German Nazi party which was led by Adolf Hitler. The largest group of victims were Jewish people.