-
His mentor, came up with the atomic theory, but Democritus adopted it. It states "The universe is composed of two elements, the atoms and the void in which they exist an move".
-
Believed in the four elements of earth, wind, water, and fire. He believed everything on Earth was made of small amounts of each of these elements. He lead the world astray on the atomic theory
-
-
-
-
Definite Properties, which states that a compound is composed of exact proportions of elemnts by mass reguardless of how the compund was created
-
John Dalton said that all matter was made of atoms. His model of an atom was simply a sphere.
-
Discovered natural radioactivity in elements
-
Originatior of the quantum theory of energy, which is found at the base of all physics and most atomic models
-
Albert Einstein mathematically proved the existance of atoms. He said that they were tiny invisible particles.
-
Thomson discovered the electron. He proposed the plum pudding model of the atom, a model in which the electrons were randomly spaced throughout a positively charged sphere.
-
Worked with Geiger, and Marsden to carry out the Geiger-Marsden experiment to examine the stucture of an atom. They found an atomic nucleus with became an integral part of the Rutherford model of an atom
-
Millikan determined the charge and mass of an electron.
-
Niels Bohr created the Borh model of the atom that has a positively charged nucleus and electrons that orbit the nucleus.
-
-
-
Louis de Brogile discovered that electrons move as waves under certain conditions.
-
He developed the quantumn mathematical model of the atom, which predicts the odds of the location of the electron
-
Heisenberg contributed to the atomic theory by including quantumn mechanics, the branch of mechanics based on quantumn theory, used for interpreting the behavior of elementary particles and atoms
-
Chadwick discovered the existance of neutrons
-
-
-
-
-
-
