20 Cool and Creative Quote Tattoos on Guys
In 1909, Strmholm and Svedberg proposed that the periodic table based on atomic weight was only an approximation. Rather than being completely uniform in weight, elements were mixtures of chemically identical substances having slightly different weights. This was the earliest formulation of the concept of isotopes, a conceptual breakthrough with profound theoretical and practical consequences. In 1912, Svedberg became the first professor of physical chemistry at Uppsala, a position that the university instituted for him. Colloids remained his main interest. Contrary to expectations, his research showed that colloids lacked properties that sharply distinguished them from other types of matter. Such findings eventually erased the distinction between colloid and physical chemistry.
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