Curie_Marie7

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 * __C __****__ontributions __**
 * Most important-proved that radiation is not caused by the interaction of molecules but must come from the atom itself
 * One of the few female scientists of her time; women were accepted into the science world after her
 * Found that pitchblende was four times as active as uranium and chalcolite was twice as acitve, therefore these two minerals have small amounts of another substance a lot more active than uranium.
 * Discovered that thorium is radioactive
 * Coined the word "radioactivity"
 * July 1898-Pierre and Marie discovered and named a new element polonium, in honor of Poland
 * December 26, 1898-Discovered radium, which they named for its intense radioactivity
 * 1902-Seperated one-tenth of a gram of radium chloride from a ton of pitchblende by differential crystallization
 * 1910-Isolated pure radium