Chapter 1. Imagining Atoms

1.1 Imagining Atoms

Hydrogen, H2 (g), can be dangerous because it can react explosively with oxygen, O2 (g) to form water, H2O (g).

2H2 (g) + O2 2H2O (g)

Examine the simulation to view this reaction on a molecular scale.

Kinetic Simulation

Students observer an animation: The animation shows motion of molecules in a reaction in which H2 and O2 combine to form H2O (vibration, rotation, and translation.). A spark breaks one H-H bond, then the reaction occurs forming H2O. The H2O molecules move very rapidly.

[See Molecular Workbench at http://mw.concord.org/modeler/ as an example. Open molecular workbench software (click on "2. Launch MW"), download it, double click on "Library of Models." Under "Chemistry," find "How Chemical Reactions Happen." Navigate to the simulation on page 7 of the tutorial called "Explosion." Select "spark" and run the simulation on this page.]

Drawings and/or simulations with questions to support student thinking about atomic models

To be completed by students before class

1.2 Imagining Atoms

Questions

Question 1.1

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Question 1.2

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Question 1.3

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Question 1.4

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Question 1.5

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Question 1.6

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  • Students should be able to input their answers to these questions so teacher can review before class the next day.