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Chapter 7 Vocab.
Chapter 7 Vocab.
12
Chemistry
11th Grade
03/09/2011

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Term
Alloy
Definition
A mixture composed of two or more elements; one of which is a metal
Term
Chemical Formula
Definition
An expression that indicates the number and type of atoms present in the smallest representative unit of a substance
Term
Coordination Number
Definition
The number of ions of opposite charge that surround each ion in a crystal
Term
Crystal
Definition
A solid in which the atoms, ions, or molecules are arranged in an orderly, repeating, 3D pattern-called a crystal lattice
Term
Electron Dot Structure
Definition
A notation that depicts valence electrons as dots around the atomic symbol of hte element
Term
Formula Unit
Definition
The lowest whole-number ratio of ions in an ionic compound
Term
Halide Ion
Definition
A negative ion formed when a halogen atom gains an electron
Term
Ionic Bond
Definition
The electrostatic attration that binds oppositely charged ions together
Term
Ionic Compounds
Definition
A compound composed of positive and negative ions
Term
Metallic Bonds
Definition
The force of attraction that holds metals together
Term
Octet Rule
Definition
Atoms react by gaining or losing electrons so as to acquire that stable electron structure of a noble gas, usually 8 valence electrons
Term
Valence Electrons
Definition
An electron in the highest occupied energy level of an atom
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