Marie curie and radioactivity

Marie curie was a scientist who studied radioactivity . radioactivity is when a atom decays it let's of particles ( like protons and neutrons) and become a totally different atom . and she was interested in science since she was very young .she was not allowed to go to school in poland (poland was part of russia and the poles hated the Russians ) though . Because of her passion of science she went to Paris for college and became one of the first woman professors there. And married a French man called Pier Curie . The curies experimented with uranium and Marie
Came up with an idea that radioactivity was caused within the atom and that the atom was changing .Before her scientist's thought atoms did not change . She found out that substances with more uranium had stronger rays and substances with less uranium have weaker rays . She experimented with a mineral called thorin and see found the same results as with the uranium and called it radioactivity . She execrated uranium from a rock called pitchblende she discovered that the pitchblende had a stronger radioactivity then uranium she
execrated from the pitchblende . So with pier's help she found two new
Elements from the pitchblende called polonium Po 84 and radium Ra 88 . In 1903 The curies and Henri becquerel ( who found radioactivity but did not name it ) revived the noble prize in physics and in Marie got the noble prize for chemistry for finding the two elements . radioactivity was useful but also harmful Marie died of a blood
Disease caused by radioactivity .