-
460
Democritus
Born: BC 460,
Died: BC 370 An ancient greek philosopher who was known for the atomic theory. -
Law of conservation of mass
Discovered in 1789 by Antoine Lavoisier. States that mass can neither be created nor destroyed in chemical reactions. -
Dalton's atomic theory.
Discovered by John Dalton, this was known as the first useful atomic theory of matter. -
law of definite proportions
Discovered by Josewph Proust, this law states that a chemical compound always contains exactly the same proportion of elements by mass. -
J.J. Thompson
J.J. Thompson (18 December 1856 – 30 August 1940), was a physicist who discovered the electron and conducted the Cathode Ray tube experiment. -
Robert A. Millikan
Robert A. Millikan, an American Physicist who won a nobel prize for his measurement of the charge on the electron and for his work on the photoelectric effect. -
Ernest Rutherford
Ernest Rutherford August 30, 1871 - October 19, 1937 who created the rutherford model of an atom. -
Cathode Ray Tube Experiment
Discovered by J.J. Thompson, it was examined in hope to gain information of the nature of Cathode tube rays. -
Plum Pudding Model
Discovered by J.J. Thompson, it helped him discover the electron and announce the fact that atoms must have structures. -
Gold Foil Experiment
Rutherford's conclusion that most of the mass of an atom was contained in the small nucleus, and that the rest of the atom was mostly empty space, -
Bohr Planetary Model
A model proposed by Niels Bohr, which is a modification of Rutherford's model. -
Quantum Mechanical Model
A model that was created to explain observations of an atom. -
Rutherford Model
The model of an atom, which was made by Ernest Rutherford.
