Activity Number
204
Editable
Overview and Learning Objectives
Central Concepts
Textbook References
Benchmarks and Standards
Activity Credits
Requirements

Ionic Bonds and Their Effect on Molecular Structure (interactive 1-page model)

Interactive model, with minimal support

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This Activity Requires:

  • Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead.

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Overview and Learning Objectives

This model allows you to see how an ionic crystal is formed when the temperature is lowered. You will observe that, in contrast to the fact that particles without charges often crystallize to most close-packed lattice structure, particles with charges tend to crystallize to a square lattice, which is not the most close-packed structure.

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Central Concepts

Key Concept:

Ionic bonds are formed by electrostatic forces between charges on atoms. Ionic bonds are usually much stronger than the van der Waals potentials between atoms. Because of them, ions with positive and negative charges tend to stick together.

Additional Related Concepts

Physics/Chemistry

  • Bonds
  • Charge
  • Ionic bonds
  • Salt
  • Solubility
  • Solutions

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Textbook References

  • Biology (Prentice-Hall) New York Edition - Chapter Two - The Chemistry of Life
  • Biology: Concepts and Connections (Pearson) 5th Edition - Chapter 2: The Chemical Basis of Life

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Benchmarks and Standards

NSES

  • Physical-Science: Matter Structure/Properties - 3 Bonds between atoms are created when electrons are paired up (Full Text of Standard)

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Activity Credits

Created by CC Project: Molecular Workbench using Molecular Workbench

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Requirements

  • Java 1.5+ - Java 1.5+ is available for Windows, Linux, and Mac OS X 10.4 and greater. If you are using Mac OS X 10.3, you can download MW Version 1.3 and explore within it instead.

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NSF Logo
These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701, EIA-0219345, DUE-0402553, and 0628181.

Any opinions, findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.