CHE 1405 Chapter Notes - Chapter 2: Glossary Of Architecture, Joseph Priestley, Atomic Theory
Document Summary
Leucippus theorized that if you kept dividing water droplets, there had to be a point where you could divide them no longer. Democritus expanded that idea and called particles atomos (atoms: each kind of atom is distinct in shape and size, real substances = mixtures of various atoms. Aristotle believed that dividing particles was continuous and he was believed over leu- cippus and democritus. 2. 2 scientific laws: conservation of mass and definite proportions. Robert boyle theorized that elements are made of different atoms. He believed that if a substance could be broken down then it was not an element. Joseph black discovered that air is a mixture. Joseph priestly and carl sheele discovered oxygen. Antione-laurent lavoisier found that all matter is constant (conserved, can neither be created nor destroyed) The law of conservation of mass matter is neither created nor destroyed during a chemical change.
