History has correctly pointed out that many scientists have made discoveries as well as innovations in the past that have improved the world today. However, it should be noted that these findings did not come simply by mere reasoning. Chemistry was used and this meant long hours in the laboratory and hard work. Some of these researchers include—

^ Dmitri Mendeleev
^ John Dalton
^ Roald Hoffmann
^ Glenn T. Seaborg
^ Marie Curie
^ Robert Boyle
^ Fritz Haber
^ Linus Pauling
^ Amedeo Avogadro

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