Question

how invented periodic table​

Answer 1

Answer:

Dmitri Mendeleev

Explanation:

In 1869 Russian chemist Dmitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them. In 1886 French physicist Antoine Becquerel first discovered radioactivity.

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Answer 2

Answer:

Dimitri Mendeleev.

An Russian Chemist .