In science, Isaac Newton (1643-1727) was an English physicist noted for his 1686 The Principia, in which the theory of universal gravitation, three laws of motion, and the concept of "force" were put forward, and the 1704 Opticks, a latter edition of which (1718) led to the start of the chemical revolution, in particular the description of chemical force and affinity tendencies in the famous “Query 31”. 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.