1 jan 1898 ano - Marie Curie: Radioactivity and new elements She conducted experiments with uranium and thorium to research about radioactivity and its process of decay and also discovered two new elements - polonium and radium. She is the first person to win 2 Nobel Prizes and the first female to win the prize.

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Atomic Structure timeline

ByHillary Yip

25 nov 2017

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