AP Chemistry Flashcards: Structure of Ionic Solids
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
What is the arrangement of ions within an ionic crystal?
Ions in an ionic crystal are arranged in a systematic, 3D array, also known as a lattice.
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What is the arrangement of ions within an ionic crystal?
Ions in an ionic crystal are arranged in a systematic, 3D array, also known as a lattice.
What is the primary principle that governs the structure of an ionic lattice?
The lattice is arranged to maximize the attractions between oppositely charged ions and minimize the repulsions between ions with the same charge.
How does Coulomb's law apply to the structure of an ionic solid?
The arrangement of ions in a crystal lattice is consistent with Coulomb's law, which describes the electrostatic forces of attraction and repulsion that the structure seeks to optimize.
When creating a particulate model for an ionic solid, what two key aspects must it be consistent with?
The model must be consistent with Coulomb's law and the properties of the constituent ions (such as size and charge).
What is a particulate model of an ionic solid?
It is a representation of the ionic solid as a collection of individual ions arranged in a 3D lattice structure.
What is minimized in the structure of an ionic crystal?
The systematic arrangement of the crystal lattice minimizes the electrostatic repulsions between ions of the same charge.
Why is an ionic solid structured as a 3D array rather than simple ion pairs?
A 3D array maximizes the total attractive forces for each ion by surrounding it with multiple ions of the opposite charge, creating a more stable structure.
What does it mean for the arrangement of ions in a crystal to be 'systematic'?
It means the ions are arranged in a highly ordered, repeating pattern throughout the entire three-dimensional structure.
Define 'ionic crystal lattice'.
An ionic crystal lattice is the systematic, three-dimensional array that ions form in an ionic solid to maximize attractions and minimize repulsions.
According to a particulate model consistent with Coulomb's law, where would an anion be located relative to a cation?
An anion (negative ion) would be located as close as possible to a cation (positive ion) to maximize the force of attraction.