Question

chancourtis contribution to periodic table

Answer 1

Answer:

☑️☑️☑️☑️☑️☑️

☑️De Chancourtois was the first to arrange the chemical elements in order of atomic weights.

☑️He devised an early form of periodic table, which he called the telluric helix because the element tellurium came in the middle. ... de Chancourtois created a fully functioning and unique system of organizing the chemical elements....

Answer 2

Explanation:

He arranged elements in the increasing order of at mass in the form of cylindrical structure

But this arrangement didn't made into light as it was not for heavier elements classification