CHEM122 CHR-2 Scientists

Robert Boyle

proposed the idea that elements were simple substances that could not be broken down and supported the theory of corpuscles

Joseph Priestly

discovered oxygen, carbon dioxide, and that graphite is an electrical conductor

Antoine Lavoisier

discovered the Law of Conservation of Mass

Joseph Proust

discovered the Law of Definite Proportion

John Dalton

discovered the Law of Multiple Proportions and proposed the Atomic Theory alongside the Solid Sphere Model

Josephy Gay-Lussac

discovered Charles’s Law, the Law of Combining Volumes, and Boron

Amadeo Avogadro

discovered Avogadro’s Constant (same number of particles for same volume and constant temperature and pressure)

J. J. Thomson

discovered the electron and its charge-to-mass ratio through the cathode ray tube, proposing the Plum Pudding Model

Robert Milikan

Found the mass and charge of an electron through the oil drop experiment

Henri Becquerel

accidentally discovered radiation

Ernest Rutherford

discovered alpha and beta particles, making use of them in his gold foil experiment that found the atomic nucleus and paved the way for his Nuclear Model

Max Planck

found that energy is quantized, solving the UV Catastrophe

Albert Einstein

energy or light has particle properties

Niels Bohr

discovered that electrons have discrete orbits through line spectra, proposing the Bohr Model

Louis de Broglie

discovered that electrons and matter in general have wave properties