Question

who evented the periodic table?​

Answer 1

In 1869 Russian chemist Dimitri Mendeleevstarted 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 Bequerel first discovered radioactivity.

Answer 2

Answer: Dmitri Mendeleev

Explanation: In 1869 Russia 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 Bequerel first discovered radioactivity.