How many elements were discovered at the time of the creation of the periodic system and the periodic law?

bystudin | August 17, 2020 | Education

How many elements were discovered at the time of the creation of the periodic system and the periodic law? Why was the periodic law an incentive to discover new elements? How could the development of the theory of the structure of the atom explain the phenomenon of periodic repetition of the chemical properties of atoms?

At the time of the creation of the periodic law, 63 chemical elements were discovered.
The periodic law made it possible to predict the properties of the elements not yet discovered, which was an incentive for their search.
The phenomenon of periodicity in changing the properties of chemical elements was explained by the electronic structure of atoms.

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