-
oxygen
Joseph Priestley discovers oxygen the nature of elements. -
electicity trars forms chmicals
humphry davy findns the electrcity transforms chenicals -
Atomic theory
John Dalton provides a way of linking invisible atoms. -
atoms combine into molecule
Italian chemist amedeo avogard finds that -
synthesis of urea
friendrich woehler accidentally synthesizes urea from inorganic materials. -
chemical structure
frienrich wekule figures out the chemical structure of benxene -
atoms have fignatures of light
Gustar kir chhoff and robert Busen find that each element absorbs -
periodic table
dmitry mendeleyer renlixes that if all of the -
electron
J.J.Thomson discovers that ethe negatively charged particles -
electrons for chmical bond
Niels Bohr publishes his model of atomic struture.
