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Aristotle and Democritus
Aristole- opposed the atomic theory
Democritus- theorized the first atomic theory
Both were Greek philosphers! -
Robert Boyle
First Modern Chemist -
Charles Augustin de Coulomb
Created Coulomb's LAw and the SI Unit of electric charge also called the Coulomb. -
Atomic Theory
A scientific theory of the nature of matter, which states that matter is composed of atoms. A pre-modern atomic theory was proposed by Greek philosophers Democritus, Leucippus, and the Epicureans who theorized there were invisible atoms and an empty void. -
Joseph Proust
Theriozed the Law of Definate Proportions or Proust's Law. -
John Dalton
English chemist who developed the modern atomic theory. -
Law of Conservation of Mass
Antoine Lavoiser states that for any system closed to all transfers of matter and energy the mass must stay the constant over time because it can not change when nothing is added or taken away. -
Law of Definite Proportions
Also known as Proust's Law, it explains that a chemical compound always contains exactly the same proporton of elements as according to mass. Joseph Proust was the scientist who came up with this theory. -
Spherical Model
Dalton created this model. -
James Clerk Maxwell
Theorized special relitivity and quantum mechanics. -
Eugen Goldstein
Discovered anode rays and is sometimes credited withn the discovery of the proton. -
Earnest Rutherford
Father of neuclear physics. -
Frederick Soddy
Explained radioactivity and also proved isotops exist in radioactive elements. -
Albert Einstein
Theorized the general theory of relitivity, had a lot to do with the field of quantum mechanics, and much more. -
Cathode Ray Tube Experiment
J.J. Thomson sugested atoms have parts based off of Jean Perrin's 1895 experiment. He took a pair of metal cylnders with a slit in them, connected it to an electometer, and bent the ray with a magnet. He seperated the charge from the rays. When they entered the slit, there was a negative charge. He realized the negative charge and cathode rays must be stuck together considering you cannot seperate them. -
The Electron
Theorized by Richard Laming in 1838 and G. Johnstone Stoney in 1874, the elcetron was discovered by J.J. Thomson in 1897. It is a subatomic particle with a negative elcetric chage of 1. It is represented by e-. -
Quantum Theory
Physics based on the principle that matter and energy have the properties of both particles and waves. Max Planck theorized that energy can be emitted or absorbed by matter only in small units called quantra. -
Wolfgang Pauli
Created the Pauli Principle or spin theory which is underpinning the structure of matter and whole of chemisty. -
Werner Heisenburg
Contributed to quantum mechanics and the uncertainty principle. -
Plum Pudding Model
J.J. Thomson created this model which later disproved. -
Gold Foil Experiment
Rutherford published this experiment in 1911 after seeing J.J. Thomsons "plum pudding" model (1904). Hans Geiger and Earnest Marsden helped him in conducting it. Rutherford accidentally demonstrated the existance of the nucleus and disproved the plum pudding model. -
Nuclear Model
Rutherford created this model. -
Glenn T. Seaborg
Nobel Prize for Chemisty because of the transranium elements he discovered and the actinide concept. -
Bohr Model
Bohr theorized this model. -
The Proton
William Prout was the person to theroized this subatomic particle with a positive electric charge of 1. It is often reffered to as p+. It got its name from Ernest Rutherford (who also discovered it in 1920). -
Quantum Mechanics Model
Schrodinger's model. -
Uncertainty Principle
The Uncertainty Principle is the idea that the momentum and position of a particle cannot both be precicely determined at the same time. Werner Heisenburg therorized this fundamental principle. -
The Neutron
Although theorized in 1920 by Ernest Rutherford, the neutron was discovered in 1932 by James Chadwick. It has no net electical charge and is also a subatomic particle. It can be written as n0. -
Modified Neuclear Model
