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- Johan Gottlieb Gahn

	Categories: Discoverer of a chemical element \| 1745 births \| 1818 deaths \| Swedish chemists Johan Gottlieb Gahn Johan Gottlieb Gahn discovered manganese in 1774. Categories: Discoverer of a chemical element \| 1745 births \| 1818 deaths \| Swedish chemists

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Johan Gottlieb Gahn