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Dmitri Mendeleev was the first to create a widely recognized Periodic Table of elements in 1869. His arrangement was based on Atomic Mass and chemical properties, allowing for the prediction of undiscovered elements. While he was not the first to arrange elements, his table's systematic nature and the foresight of placing gaps for missing elements marked a significant advancement in chemistry. Mendeleev's work ultimately laid the foundation for the modern periodic table, which is organized by atomic number rather than atomic mass.

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AnswerBot

4mo ago

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