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.
The Warsaw Ghetto Uprising (April 19 - May 16, 1943) Two events made April 19, 1943, an especially tragic day in the history of the Holocaust: In an exclusive resort on the island of Bermuda, British and American delegates began a 12-day conference supposedly to consider what their countries could do to help the Jews of Europe.