Aristotle
Added a 5th element, a divine substance called aether
Becquerel
Discovered radioactivity using uranium and photograph paper and releasing alpha particles
Bohr
discovered shells for hydrogen using his model
Boyle
Said that elements are distinct from mixtures and compounds, and elements are made of particles of various shapes
Brand
Tried to make the philosophers stone, discovered elemental phosphorous
Dalton
Law of multiple proportions, and four postulates of atomic theory
de Broglie
All particles have wave properties, λ = h/mν
Democritus
Said that matter is made of atoms
Einstein
E = mc^2, Special theory of relativity, Photoelectric effect
Heisenberg
(Δx)(Δ(mv)) > h/4π
Lavoisier
law of conservation of mass
Mandeleev
Made the first modern periodic table with 66 elements
Millikan
Oil drop experiment to find the charge of an electron
Planck
ΔE = nhν
Plato
Particles with geometric shapes, elements (stoicheia)
Priestley
Discovered oxygen by isolating it with Scheele
Proust
Law of definite proportions, a chemical compound always contains exactly the same proportion of elements by mass
Rutherford
Shot alpha particles at a thin sheet of gold foil, discovered that mass and charge of atom is centered in middle
Scheele
Discovered oxygen by isolating it with Priestly
Shrodinger
Utilized wave function of a particle, square of wave function is probability distribution
Stahl
Phlogiston
Thomson
Cathode ray tube experiment, proposed negatively charged particles called electrons, and plum pudding model.