Example image of eyePlorer eyePlorer map for 'Law of definite proportions': Chemical compound Chemical element Chemistry Hydrogen Oxygen Water Law of multiple proportions Stoichiometry France Joseph Proust Claude Louis Berthollet Mixture Atom Atomic theory John Dalton Non-stoichiometric compound Iron oxide Wüstite Isotopic Astronomy Atmosphere Crust (geology) Earth Oceanic Carbohydrate Polymer Protein RNA Chemical law Jeremias Benjamin Richter Chemical substance Equivalent weight Mole (unit) Jöns Jacob Berzelius Mendeleev's predicted elements Molecule Amount of substance Laws of science Wave–particle duality Angers History of chemistry Metallic bond