History/Structure of Atoms

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Presentation transcript:

History/Structure of Atoms

Ancient Greeks Thought all matter was made of the four elements: Earth, Fire, Wind, and Water.

Dalton Dalton proposed the theory that all matter is made up of individual particles called atoms, which cannot be divided.

A model was designed and had the shape of a solid ball. Dalton’s Theory Cont. A model was designed and had the shape of a solid ball.

Thompson’s Theory Through experimentation was able to find that the atom was made of even smaller particles.

Rutherford’s Atomic Theory Idea that there was a concentration of positive particles at the center of an atom. Gold foil experiment proved theory.

Rutherford Model

Atomic Structure Three subatomic particles Electron – negative charge Proton – positive charge Neutron – neutral charge