- Johan Gadolin (1760-1852)
- Born in Finland.
- He discovered yttria (gadolinite).
- Joseph Louis Gay-Lussac (1778-1850)
- Born in France.
- He discovered boron and Iodine.
- He studied acids and bases and discovered litmus.
- He improved the production of sulfuric acid
- He formulated Gay-Lussac’s Law.
- Charles Frédéric Gerhardt (1816-1856)
- Born in France.
- He rationalized atomic weights and molecular formulae.
- He developed a new type theory of organic compounds.
- He discovered quinoline.
- Johann Rudolpf Glauber (1604-1670)
- Born in Germany.
- He investigated the production of mineral acids and salts.
- He prepared compounds from alcohol, acetic acid, and pyroligneous acid.
- Leopold Gmelin (1788-1853)
- Born in Germany.
- He discovered potassium, ferricyamide, and taurine.
- He confirmed the presence of hydrochloric acid in the gastric juice.
- He wrote Handbuch der Theoretischen Chemie.
- He studied the constituents of bile.
- Charles Goodyear (1800-1860)
- Born in United States.
- He discovered vulcanization of rubber.
- Thomas Graham (1805-1869)
- Born in Scotland
- He established the principles of colloid chemistry.
- Louis Bernard Guyton de Morveau (1737-1816)
- Born in France.
- With Lavoisier, he established a system of chemical nomenclature.
