CHEM-TO-GO LESSON 5: BASIC ATOMIC STRUCTURE CONVERSATION STARTER Materials: 1)Periodic table and Basic Atomic Structure video notes 2)Unit 2 Practice Packet.

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CHEM-TO-GO LESSON 5: BASIC ATOMIC STRUCTURE CONVERSATION STARTER Materials: 1)Periodic table and Basic Atomic Structure video notes 2)Unit 2 Practice Packet 3)Pencil and calculator

Collaborative Application Experience 5 Minute Chat Discuss and review the significance of each of the three subatomic particles with your partner. 1)If our atom were an island, which particle would be the most valuable in your opinion? 2)Which particle would you “vote off the island” if we run out of resources?

Collaborative Application Experience Three Important Numbers 1)Atomic Number 2)Mass Number 3)Atomic Mass Which of these numbers is displayed on the periodic table? What does each number tell us about the atom? How is each number calculated?

Turn to the “Atomic Structure Numbers” handout in your practice packet. Work with your partner to answer the 25 questions which require you to apply what you learned about isotopic notation. Collaborative Application Experience 1-5 ASSUME THE ATOM HAS NO CHARGE! “CHEMICAL SYMBOL” = ISOTOPIC NOTATION DON’T ASSUME ABOUT NEUTRONS !

A Quick History Lesson Seven Significant Historical Figures: 1) Democritus (~ 400 BC) – “atomos” 2) Aristotle (~ 400 BC) – no “atomos” 3) John Dalton (early 1800s) - finally, yes to atoms 4) JJ Thomson (1800s) – Cathode Ray Experiment 5) Ernest Rutherford (1800s) – Gold Foil Experiment 6) Neils Bohr (1913) – Energy levels = planetary atom 7) Heisenberg, Schrodinger, etc. (1920s) = quantum mechanical model