Responsible for summarizing matter
First person to coin the term atom ("atomos")
Any substance of 2 or more parts is not an element, instead a compound
Father of modern chemistry, introduced experimentation, said an element only has one component, water is a compound, and a compound = two or more elements
Worked with a gas that made water when it was burned; Lavoisier names it hydrogen or "water former"
Worked with a gas that in the presence of water produced an acid, caused candles to burn brighter, and charcoal to burn hotter; Lavoisier names it oxygen or "acid former"
Found the mass ratio used to create water (8 grams oxygen + 1 gram hydrogen = 9 grams water)
First to postulate the atomic theory; thought that water was OH
2 L Hydrogen + 1 L Oxygen = 2 L Water; discovered that hydrogen and oxygen are diatomic elements
At constant temperature and pressure, equal volumes of gases contain the same # of particles
Did the cathode ray tube experiment and found that atoms have negative portions and leads to the plum pudding model of the atom (negative particles suspended in a positive field)
Did the gold foil experiment using radiation, gave us the proton
Discovered that neutrons have the same mass as protons, but are a neutral charge
Arranged the periodic table, and noticed that the elements have periodic behavior