Question

Who created the periodic table and in what year?

Answer 1

In 1869, Russian chemist Dmitri Mendeleev

Answer 2

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In 1869, the Russian chemist Dmitri Mendeleev published his first periodic table of the elements arranged in order of increasing atomic mass.

Mendeleev organized his table in horizontal rows, leaving empty spaces where they had to incorporate some elements that had not yet been discovered.

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