The elements which have different atomic number but have same mass number are called as isobars. Since they have different atomic number therefore they are placed seperatly in the periodic table but they have same mass number. For example; Iodine-131 and Xenon-131 are isobars of eachother.
The Holocaust and World War II: Timeline. January 30, 1933: President Hindenburg appoints Adolf Hitler Chancellor of Germany. March 20, 1933: SS opens the Dachau concentration camp outside of Munich. April 1, 1933: Boycott of Jewish-owned shops and businesses in Germany. April 7, 1933: Law for the Reestablishment of the Professional Civil Service.
when did world war 2 start global perspective if answering for a secondary education class the book answer for when world war 2 started is when the germans invaded poland on polish artillery in battle of bzura 1939 after an air attack polish bofors aa gun and a bombed column of polish armyhe typical date agreed upon by historians to answer the question of when did world war 2 start is september 1 st 1939