He discovered three elements: cerium, thorium, and selenium.
The first named person in history to discover a chemical element.
Architect of the Copenhagen interpretation of quantum mechanics.
The first scientist to realize that elements could exist in the form of molecules rather than as individual atoms.
One of the first scientists to condemn alchemy.
The discovery was arguably the most significant experimental breakthrough of twentieth century science.
He defined elements, compounds, and mixtures
Invented the zinc-carbon battery and flash photography.
She carried out the first research into the treatment of tumors with radiation.
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