History of Chemistry By kmwright Jan 1, 1733 Discovery of Oxygen- Joseph Priestly discovered oxygen where we found stuff Jan 1, 1743 Discovery of Nitrogen- A.L. Lavoisier discovered nitrogen where we found stuff Jan 1, 1776 Development of smallpox vaccine- Edward Jenner invented the vaccine for smallpox where we found stuff Jan 1, 1798 Found that heat was a form of energy- Count Rumford thought that heat was a form of energy where we found stuff Jan 1, 1800 Invented the electric battery- A. Volta invented the electric battery where we found stuff Jan 1, 1800 Dalton Atom Model Dalton Model Picture Jan 1, 1897 Plum Pudding Model, Thomson plum pudding model Jan 1, 1909 Rutherford Model rutherford Model Jan 2, 1913 Bohr Atom bohr model