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Graph : Dmitri Mendeleev was born #OTD in 1834. He published a periodic…

Infographic : Dmitri Mendeleev was born #OTD in 1834. He published a periodic…

Dmitri Mendeleev was born #OTD in 1834. He published a periodic table which ordered the elements by increasing relative atomic mass and left gaps for undiscovered elements. https://ift.tt/3oXB37J

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