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460
Democritus
He was born somewhere around 470 B.C.E.
He is known as the father of atomic science, and his nickname is a good fit because he came up with the theory of atoms, and How they make up every thing. -
John Dalton
These are Daltons atomic theories
Elements are made of extremely small particles called atoms.
Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.
Atoms cannot be subdivided, created, or destroyed.
Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
In chemical reactions, atoms are combined, separated, or rearranged. -
JJ Thomson and the Cathode Ray Experiment
He discovered that atoms were made up of small particles. With this he discovered the electrons. He did this using the Cathode Ray experiment. In this experiment he placed two electric plates on a path and the light bent towards the positivly charged plate. -
Earnest Ruthford and the Gold Foil Experiment
Earnest Ruthford was known as the father of nuclear physics and he is known for being the first to discover the structure of the atom. He constructed the gold foil experiment to discover the structure of an atom. He did this by bombarding a thing gold foil sheet with fast moving alpha particals. -
James Chadwick
James Chadwick was the first to prove that the neutron existed at Liverpool University -
Niels bohr
He is known for the Bohr atomic model, which was named after him. Though his model has been replaced by newer and more accurate ones, his still remains somewhat valid. His model is similar to a model of the solar system, with the nucleus being the sun, and the electrons being the planets. He also said that the electrons could jump rings. -
Erwin Shroediger
He wrote a paper on the wave length of atoms and how to find them. He was also made an equation that would help predict where the electrons would be.
