J鰊s Jacob BERZELIUS (20 August 1779 - 7 August 1848);Swedish chemist. In the period of evolution of chemistry that led to the drafting of the periodic table of the elements;he identified some as cerium;silicon;selenium and thorium. He coined the term "organic chemistry";distinguishing the compounds from those of mineral origin;and he modified the writing of chemical formulas by introducing literal symbols. Colored etching from a painting by Olof Johan S鰀ermark (1790 - 1848) from 1843