Søren Peder Lauritz Sørensen proposed the notion of pH in 1909.
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The first person to categorize acids and bases in chemical terms would be Danish chemist, Soren Peder Lauritz Sorensen, and he did so in 1909. Sorensen was first to introduce the concept of pH, the scale of measure for acidity and basicity.
Carlos Montezuma, Erik Sorensen (Princeton)
Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.Sigma notation was invented, not discovered.
i think it was invented in the 1200s i think it was invented in the 1200s
No body invented bactaria.