Before revision: according to Partington's A Short History of Chemistry, that:In coordination with these concepts, in 1833 the French chemist Marc Antoine Auguste Gaudin presented a clear account of Avogadro's hypothesis, regarding atomic weights, by making use of "volume diagrams", which clearly show both semi-correct molecular geometries, such as a linear water molecule, and correct molecular formulas, such as H2O: center|350x350px|Marc Antoine Auguste Gaudin's volume diagrams of molecules in the gas phase (1833) In 1917, an unknown American undergraduate chemical engineer named Linus Pauling was learning the Dalton hook-and-eye bonding method at Oregon State University , which was the mainstream description of bonds between atoms at the time.
After revision: according to Partington's A Short History of Chemistry, that:In coordination with these concepts, in 1833 the French chemist Marc Antoine Auguste Gaudin presented a clear account of Avogadro's hypothesis, regarding atomic weights, by making use of "volume diagrams", which clearly show both semi-correct molecular geometries, such as a linear water molecule, and correct molecular formulas, such as H2O: center|350x350px|Marc Antoine Auguste Gaudin's volume diagrams of molecules in the gas phase (1833) In 1917, an unknown American undergraduate chemical engineer named Linus Pauling was learning the Dalton hook-and-eye bonding method , which was the mainstream description of bonds between atoms at the time.