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Chapter 3 – Inside the Atom

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Presentation on theme: "Chapter 3 – Inside the Atom"— Presentation transcript:

1 Chapter 3 – Inside the Atom
Section 1 Models of the Atom

2 I. Chemistry: The study of matter, what it is made of, and the changes it goes through. A. Greek philosophers devised a theory of ATOMS, or tiny PARTICLES

3 ELEMENTS: matter made of atoms of only ONE kind.

4 B. John DALTON combined the idea of ELEMENTS with the Greek theory of the atom.
!!!Yes, another funky Scientist in the hizous!!!

5 Dalton’s thinking… Matter is made up of ATOMS
Atoms CANNOT be divided into smaller pieces. All atoms of an element are exactly ALIKE Different elements are made of DIFFERENT atoms

6 Dalton’s ATOM MODEL Dalton thought atoms were hard SPHERES that were the same throughout, like a MARBLE

7 Dalton’s thinking… 5. Dalton’s theory was tested by William CROOKE and his CATHODE-RAY tube experiment

8 Dalton’s model was NOT changed…yet. See page 66 in your textbook!

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