1. History/Structure of Atoms

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

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

5. 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.

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

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

8. Rutherford Model

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