Before revision: Based on their atomic weights and chemical similarities.The first modern list of chemical elements was given in Antoine Lavoisier's 1789 Elements of Chemistry, which contained thirty-three elements, including light and caloric.
After revision: Based on their atomic weights and chemical similarities.The first modern list of chemical elements was given in Antoine Lavoisier's 1789 Elements of Chemistry, which contained 33 elements, including light and caloric.