Question

Who is Dmitri nikolovic mendeleev?

Answer 1

Dmitri Mendeleev was a Russian chemist who lived from 1834 to 1907. He is considered to be the most important contributor to the development of the periodic table. His version of the periodic table organized elements into rows according to their atomic mass and into columns based on chemical and physical properties. He recognised 63 elements and arranged them in a table where few gaps 're left for other elements if their.

In his theory vertical columns 're called groups and horizontal is called periods.

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