2 mar 1860 ano - De Chancourtois was a French
scientist and the first to arrange
the periodic table considering
the atomic weight of elements.
This way, he made use of a
physical property that can be
represented as numbers.
The elements were arranged
in order of increasing weight.
He arranged the elements in
a cylinder as a spiral called
telluric helix. The helix
allowed to see similar
elements lined up vertically
