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356
Aristotle
He was a Greek philospher who did not believe in the existence of atoms. He believed that humans were made of Fire, Earth, Water, and Air. -
415
Democritus
He was a Greek philosopher. Who believed that everything was made of atoms and that atoms are indestructible; and always will be, in motion; that there are an infinite number of atom which differ in shape, and size. -
John Dalton
John Dalton was an English chemist, meteorologist and physicist.He is mainly known for his work in developing the modern atomic theroy. -
JJ Tohmson
Sir Joseph John "J. J." Thomson, was a British physicist. He found the electron and proposed a model for the the atom. Thomson knew that electrons had a negative charge and thought that matter must have a positive charge. -
Hantaro Nagaoka
Nagaoka was a Japanese physicist. He developed an incorrect "planetary model" of the atom. The model was based around the rings of Saturn (the rings are stable because the planet they orbit is very, very massive). -
Ernest Rutherford
Lord Ernest Rutherford was a Physicist-Chemist. Who claimed that atoms have their positive charge clustered in a very small nucleus, and so pioneered the Rutherford Theory. He was credited with first "splitting the atom" in 1917. -
Niels Bohr
Niels Henrik David Bohr was a Danish physicist. In Bohrs model we described the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus. -
Erwin Schrodinger
Erwin Rudolf Josef Alexander Schrödinger. He suggested electrons behave in a wave.
