#OnThisDay, 7 Jan 1939, French physicist Marguerite Perey discovers element 87, which she later names francium.

#OnThisDay, 7 Jan 1939, French physicist Marguerite Perey discovers element 87, which she later names francium. It was the last element to be discovered naturally.

Perey was a student of Maria Skłodowska-Curie. She was nominated five times for the Nobel Prize but never received it.

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