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Existed in 500 B.C.
All matter consists of extrmely small particles that couldn't be divided. He used discourse to conclude his thoughts. -
About 500 B.C.
Aristotle beieved there was no limit to the number of times matter could be divided. He used discourse to process his theory. -
Newton proposed that we live in a mechanical universe with small solid masses in constant motion.
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Dalton studied gas behaivior in the air. Based on gases exert pressure he proposed that all matter is made up of individual particles called atoms, which cannot be divided.
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J.J. Thomson hypothesized that atoms are made of even smaller particles. To reach his discovery he experimented with 2 tubes of glass in A: when the current was on, the disks became charged and a glowing beam appeared in the tube, B: The beam bent toward a positively charged plate placed outside the tube.
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He made 2 predictions: That atoms have a very massive nucleus and that electrons revolve around the nucleus, bound by electrostatic forces. He created a planetary model about Saturn and its ring. He used other peoples ideas and sculpted his own from that.
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Marsden was one of Rutherfords students, who helped him to find out what happens to alpha particles when they pass through a thin sheet of gold.
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Ernest Rutherford states his atoms have a central positive nucleus surrounded by negative orbiting electrons. After doing his famous gold foil experiment in which he fired radioactive particles through thin metal.
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He proposes the electrons move in spherical orbits at fixed distances from the nucleus.
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Broglie said that when particles move they create a sort of wave. It takes him a few years after he says this to collect supporting data.
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Schrodinger tried to determine the motions in which electrons travel in, he created mathmatical equations to do so.
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Werner was the founder of the Principle of Indeterminancy, which states you can not know both the position and velocity of a particle.
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Chadwick was a British physicist, who confirmed the existence of neutrons. Atomic nuclei contain neutrons and positive charged protons.
