1. BELL WORK! Create a flow chart using the words listed below:
Pure Substances
Matter
Elements
Mixtures
H2O
Compounds
Homogeneous Na
Heterogeneous
Pizza
Tea

3. The Development of the Atomic Theory
Chapter 10, Section 1

4. Preparing for TCAP… atoms SPI 0807.9.1—Matter consists of __________.
What we already know:
____________ are made up of one type of atom.
Elements are __________ substances.
Two or more elements combined chemically make a ____________.
Today’s Goal: Know how the discovery of the atom happened.
Elements
pure
compound

5. Science is constantly changing!
Set up the following table in your composition notebook on page 59.
Person
Idea

6. Development of the Atomic Theory
Person: Democritus Idea: Discovered the atom

7. Development of the Atomic Theory
Person: John Dalton Idea: Published an atomic theory

8. Development of the Atomic Theory
Person: JJ Thomson Idea: Discovered electrons

9. Development of the Atomic Theory
Thomson’s Plum-Pudding Model…

10. Development of the Atomic Theory
Person: Ernest Rutherford Idea: Discovered protons

11. Development of the Atomic Theory
Person: Niels Bohr Idea: Electrons move in energy levels

12. Development of the Atomic Theory
Person: Schrodinger and Heisenberg Idea: Electrons are in electron clouds.

13. Let’s review…
Tell your neighbor how Thomson’s Plum-Pudding model is like chocolate chip cookie dough.