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Democritus
He said that all matter is made up of atoms. Also, he said that they are invisible and can not be broken down. -
John Dalton
He made the atomic theory. The theory says that matter is compose of atoms that all of the same atomic weight. -
J.J. Thomoson
Was the first to discover the electron. -
Robert Millikan
Determined the charge of an electron. -
Ernest Rutherford
Determined that all the mass in a atom is in a small positive charged ball in the center of the atom called the nucleus. -
Niels Bohr
He developed the Bohr Model which had a nucleus in the model with electrons traveling in a circular motion around it. -
Albert Einstein
Albert made the discovery of the law of the photoelectric effect. The law says that electrons are emitted from solids. liquads, and gases. -
Louis de Broglie
He suggested that all matter has wave wave properties. This is called wave particle duality -
Wolfgang Pauli
He introduced the Pauli Principle or exclusion principle. It involved the spin theory. -
Erwin Schrodinger
Made the Schrodinger equation, an equation that deals with waves and how they control the motion of small particles. -
Werner Heisenberg
He helped create the quantum model. The model proves that you can't find the exact location of electrons. -
James Chadwick
Discovery of the neutron.
