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GOB Chemistry

Learn the toughest concepts covered in your GOB - General, Organic, and Biological Chemistry class with step-by-step video tutorials and practice problems.

Gases, Liquids and Solids

Atomic, Ionic and Molecular Solids

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Crystalline solids represent structures with well-organized patterns and shapes. Amorphous solids represent structures that lack an organized pattern or shape. 

Crystalline vs Amorphous Solids

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concept

Atomic, Ionic and Molecular Solids Concept 1

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Atomic, Ionic and Molecular Solids Example 1

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Problem

What is the major electrostatic force found within an ammonia molecule, NH3? 

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Problem

As it cools off, olive oil slowly hardens and forms a solid over a range of temperatures. Which best describes it as a solid?

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Problem

Compound A is hard, doesn’t conduct electricity, and melts at 1400ºC. Compound A represents which of the following:

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Problem

Classify each solid as amorphous, molecular, network covalent, alloy or ionic.

a) Steel                                                    ______________________
b) CO2                                                     ______________________
c) Graphite                                              ______________________
d) CaCO3                                                 ______________________
e) Bronze, an alloy of Cu and Sn           ______________________

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