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Antoine Lavoisier
Known as the “Father of Chemistry”
Developed Law of Conservation—says that no mass is lost in chemical reactions
Wrote first chemistry textbook -
John Dalton
Developed the first comprehensive atomic theory with 4 components
1. Atoms in matter are indestructible and indivisible.
2. All atoms have same mass & properties.
3. Compounds are two or more kinds of atoms
4. A chemical reaction is a rearrangement of atoms -
Dimitri Mendeleev
Developed periodic classification of elements and developed the first rough draft of the periodic table. -
JJ Thomson
Discovered the subatomic particle
Developed the “Plum Pudding” model of the atom, where the atom is composed of electrons—or plums—surrounded by a “pudding” of protons. -
Robert Millikan
Discovered charge and mass of electron
Conducted Oil Drop Experiment -
Niels Bohr
Created the famous Bohr model
Was a student of Rutherford -
Ernest Rutherford
Discovered and named the proton -
Werner Heisenberg
Published his theory of quantum mechanics: said that small wavelengths have a high energy amount; electrons absorb energy; and the absorbed energy will change the electron’s position -
Erwin Schrodinger
Theorized that electrons act as waves in mathematics.
Made the quantum mechanical model -
James Chadwick
Discovered the neutron
