BELL WORK! Create a flow chart using the words listed below:

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Democritus (460 BC-350BC) was a Greek philosopher who thought that all matter was made of tiny indivisible particles he called atomos.

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

The Development of the Atomic Theory Chapter 10, Section 1

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

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

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

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

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

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

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

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

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

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