Historical Figures in Chemistry

developed the idea of discrete energy levels causing different colors of light

developed the model of the atom in which electrons are surrounding a small positive nucleus.

calculated the charge on the electron

postulated the equivalence of mass and energy

discovered the electron

performed the gold foil experiment

developed the Plum Pudding Model

credited with discovering the neutron

developed the idea of atoms - there is a smallest unit of matter

concluded that an atom has a small positive nucleus

"Father of the Periodic Table"