Chapter 2 Slides

Chapter 2 Slides - "How do you tell when you're out of...

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“How do you tell when you’re out of invisible ink?” - Steven Wright
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Question (1pt) How do we know that atoms exist? a) there are new types of instruments that can take pictures of atoms; we can literally see them. b) we have indirect evidence that allows us to conclude that atoms exist; even though we can’t see atoms, there is experimental evidence that we can observe that confirms atoms do exist. c) the existence of atoms is only confirmed by mathematical calculations; there is no experimental evidence confirming the existence of atoms. d) we don’t really know if atoms exist or not, the idea of atoms is just an unproven theory.
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Clicker Case Study: Structure of the Atom 1. Where did the idea of atoms originate? 2. What is the evidence that allows us to conclude that atoms exist? 3. How have our models of the atom evolved over time?
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Democritus – Atomism (5th Century BCE)
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What “evidence” did Democritus use to conclude that atoms exist? (3 pts x 2) a) Since matter is not empty space, it must be made of uncuttable particles (atoms). b) If you divide up matter into smaller pieces for infinity, you end up with essentially nothing; since matter cannot be made up of nothing, it must have a small fundamental unit of matter that is uncuttable (atoms). c) The Greeks observed that chemical reactions could take place;
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Chapter 2 Slides - "How do you tell when you're out of...

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