Radioactivity

Metal Pure

Jul 12, 1841

If Eugene Peligot hadn't decomposed uranium oxide He wouldn't have obtained this pure metal.

X-rays

May 20, 1885

If Röntgenno Wilhelm Conrad hadn't discovered X-rays we wouldn't have been able to use it in medicine and in modern life.

Discovery of radioactivity

Sep 28, 1896

If Henri Becquerel hadn't discovered radioactivity, Marie Curie would have not discovered radium, thorium and polonium.

Discovery of radium and polonium.

Jun 16, 1898

If Marie and Pierre Curie had not discovered radium an polonium, they would haven't found its usefulness in medicine.

Nobel Prize

Nov 27, 1903

If Marie Curie hadn't found medical applications for radioactivity, She wouldn't have received the Nobel Prize.

Neutron

Apr 18, 1930

If James Chawdick hadn't discovered the neutron, we wouldn't have been able to obtain the atomic mass formula.

Nuclear fusion

Mar 11, 1932

If Mark Oliphant hadn't theorized about the fusion of light nuclei, Hans Bethe hadn't described the workings of stars based on this mechanism.

Death of Marie Curie.

Nov 22, 1934

If Mary hadn't studied about radioactivity, she wouldn't have died of leukemia.

Fission

Jun 30, 1938

If Jean Frederic Joliot-Curie and Irene Joliot-Curie hadn't bombarded boron nuclei and aluminum with alpha particles, Lise Meitner, Otto Hahn and Fritz Strassmann haven't demonstrated the first experimental observation of fission.

Warning symbol

Mar 15, 1994

If the International Atomic Energy Agency (IAEA) hadn't released a new radioactivity warning symbol, many people wouldn't have understood that some compounds are dangerous.