Swedish chemist (1779–1848)
He pinned down the atomic weights, invented the letter symbols chemists still use for elements, and discovered selenium and cerium — all before the periodic table existed. Berzelius built the measuring tools that turned chemistry from art into arithmetic.
Born in 1779, Berzelius trained as a physician but pivoted to chemistry and joined the Royal Swedish Academy of Sciences in 1808, eventually running it from 1818 onward. He worked as a strict empiricist, developing better methods of chemical analysis to nail down atomic weights and the quantitative rules of how elements combine — what became the Law of Constant Proportions. He used electrochemical cells to split compounds, leading him to a theory of electrochemical dualism: that compounds were oxide salts held by electrostatic force, a framework later outgrown but pivotal at the time. Along th…
Sourced, dated quotes from Jöns Jacob Berzelius
As mineralogy constitutes a part of chemistry, it is clear that this arrangement [of minerals] must derive its principles from chemistry.
A tidy laboratory means a lazy chemist.
The devil may write textbooks of chemistry, for every few years the whole thing changes.
Chemical signs ought to be letters, for the greater facility of writing, and not to disfigure a printed book ...
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