Discovery of Oxygen:
Joesph Preistly discovered oxygen in 1774. It was a very imortant discovery because before it, people believeed that there were 4 elements: earth, water, fire, and air. When oxygen was discovered, it opened up the study of more elements and started to show what was crucial to human life. After this first discovery, many other discoveries delved deeper into chemistry, such as the discovery of Urea in non-organic atoms, the structure of molecules, periodic table of elements, electrochemistry, Atom Light Signatures (which helped study the chemistry in space), the electron, electrons form chemical bonds, radioactivity, plastics (plastics are polymers), fullerines. These discoveries take us up to where chemisty is today.
