What did democritus Dalton Thomson Rutherford and millikan contribute to the atomic structure?

Answer 1

They collaborated on a project to create a model of the atom using spaghetti and raspberry jam. Unfortunately the Church of Scientology outlawed the use of sugary products in the study of the atom and the five men were shot into space on the back of the Voyager II

Answer 2

Dalton found out these rules about matter and atoms: * All matter is made of atoms * Atoms of one element cannot be converted to atoms of another element * Compounds are always the result of specific ratios and properties JJ Thomson- built a cathode ray tube ending in a pair of metal cylinders with a slit in them. These cylinders were in turn connected to an electrometer, a device for catching and measuring electrical charge. Perrin had found that cathode rays deposited an electric charge. Thomson wanted to see if, by bending the rays with a magnet, he could separate the charge from the rays. He found that when the rays entered the slit in the cylinders, the electrometer measured a large amount of negative charge. The electrometer did not register much electric charge if the rays were bent so they would not enter the slit. As Thomson saw it, the negative charge and the cathode rays must somehow be stuck together: you cannot separate the charge from the rays.

Millikan- Basically levitated an oil drip with the right amount of charge. He figured out both the charge and mass of an electron by a mass/charge ration.

Rutherford- Shot rays through a very thin and fine piece of gold foil. He figured it would be reflected backwards, but some rays actually went through the foil and in all different directions. He concluded that matter is composed mostly of empty space and so are atoms. But, atoms have a nucleus.

Answer 3

Dalton combined the of Conversation of Mass, the Law of Definite Proportion and the Law of Multiple Proportions to devise the first atomic theory supported by scientific evidence. Thompson used a piece of equipment called a cathode ray tube and a magnet to discover the electron. Rutherford did the gold foil experiment that led to the discovery of a very density packed bundle of matter with a positive electric charge (nucleus). Neils Bohr postulated based on quantum theory that electrons travel around an atomic nucleus in a stationary orbit. His work also led to the different energy levels in atoms, that is if an electron drops from a higher to a lower orbit, it must release energy. Heisenberg contributed the Heisenberg Uncertainty.

Answer 4

Democritus proposed the idea of the atom as the fundamental building block of matter. Dalton developed the atomic theory, stating that elements are made up of indivisible atoms. Thomson discovered the electron and proposed the "plum pudding" model of the atom. Rutherford conducted the gold foil experiment, leading to the discovery of the atomic nucleus. Millikan determined the charge of the electron through his oil drop experiment.