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Antoine Lavoisier and Conservation of Mass
He conducted an experiment, namely the combustion experiment, by reacting substances such as a glass vessel, tin, and air, and creating different products that also had the same mass. After his experiment, he concluded that "mass is neither created nor destroyed," also known as the conservation of mass. His results were meant to convince others of his theory. Furthermore, Lavoisier named many compounds with his partners. http://www.docbrown.info/page04/4_73calcs03com.htm -
Plum Pudding Model
https://puserscontentstorage.blob.core.windows.net/userimages/d675f0ff-cb55-4163-8dc0-63907c2be0b8/9dcd55b4-ef98-4493-b72f-6077199a07c1image14.jpeg J.J. Thompson discovered the electron in 1897, where he realized that the electrons had a significantly smaller mass compared to atoms. From this he proposed the plum pudding model for the structure of the atom. His structure is represented by positive pudding (the atom) having plums (electrons with negative charges).
