-
-
Everything is composed of atoms
-
-
He proposed the atomic theory with spherical solid atoms. He said that the forces of repulsion thought to cause pressure acted only between the same type of atom and that the atoms In a mixture were different in weight and complexity
-
Law of Conservation. matter can't be made or destroyed. Matter rearranged, but never disappeared.
-
-
Equal volume of gas as at the same temperature and pressure have equal number of molecules.
-
created the periodic table system we use to identify elements. Used first letter of elements name in Latin.
-
-
-
-
Discovered electrons and noticed that an atom can be divided. He made the Plum Pudding Model.
-
He used the idea of “quanta” to explain hot glowing matter
-
He used the oil drop experiment to determine the charge of an electron/negative charge.
-
disintegration theory with atoms. Atoms have tiny,heavy nucleus.
-
-
he proved that every element’s identity is determined by the number of protons it has. He discovered 4 new chemical elements
-
Explained the spectrum of atomic hydrogen by using the description of Rutherford’s atom.
-
-
Developed methods to separate radium from radioactive resides.Determined the atomic weight of radium to be 255.
-
-
Matrix mechanics. Uncertainty principle-electrons don't travel in neat orbits. All electrons contain photons.
-
Quantum mechanic atomic model does not show exact path of electron but predicts the odds of the location of the electron
-
he bombarded beryllium atoms with alpha particles. Found the neutron to have a neutral electrical charge and the same mass of the atoms protons.
-
-
-
-
-
-
Did not believe in the atomic theory
He thought that all Earth materials weren’t made of atoms but of the four elements Earth, Wind, Water, and Fire.
