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April 15th

Swiss chemist Jean-Charles-Galinard de Marignac died on this day in 1894

He was one of the first to suggest the existence of isotopes. He also discovered the element ytterbium (Yb) and co-discovered gadolinium (Gd).

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isotope ytterbium gadolinium

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April 15th Swiss chemist Jean-Charles-Galinard de Marignac died on this day in 1894

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April 15th

Swiss chemist Jean-Charles-Galinard de Marignac died on this day in 1894