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Isaac Newton
Query 31
Newton, who conceived of molecules as being structures of atoms attached together by a chemical force of affinity. He outlined his atomic chemical force affinity bonding theory in the ‘Queries’ section to his Opticks. To cite one example of Newton’s description of a gradient of affinity reactions, he states ‘and is it not for want of an attractive virtue between the parts of water and oil, of quick-silver (Hg) and antimony (Sb), of lead (Pb) and iron (Fe), that these substances do not mix; and by a weak attraction, that quick-silver and copper (Cu) mix difficultly; and from a strong one, that quicksilver and tin (Sn), antimony and iron, water and salts, mix readily?’. [1]
In 1718, during a translation into French of Newton’s Opticks, French physician and chemist Étienne Geoffroy used Newton’s descriptions of affinity reactions to construct the world’s first affinity table, containing twenty-four reacting species, detailing specifically what affinity reactions would occur between various combinations of reactants. This table seeded the chemical revolution: [2]
References
1. Newton, Isaac. (1704). Opticks (Query 31: On the small particles of bodies); London: Printers to Royal Society. Note: several editions published between 1704 and 1730.
2. Kim, Mi Gyung. (2003). Affinity, That Elusive Dream – A Genealogy of the Chemical Revolution. Cambridge, Mass: The MIT Press.
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