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Chemistry

Chapter 7 Vocabulary

TermDefinition
Alloy A mixture composed of two or more elements, at least one of which is a metal.
Chemical Formula An expression that indicates the number and type of atoms present in the smallest representative unit of a substance.
Coordination Number Number of ions of opposite charge that surround each ion in a crystal.
Electron Dot Structure Notation that depicts valence electrons as dots around the atomic symbol of the element.
Formula Unit Lowest whole-number ratio of ionic compound.
Halide Ion Negative ion formed when a halogen atom gains an electron.
Ionic Bond Electrostatic attraction that bind oppositely charged ions together.
Ionic Compound Compound composed of positive and negative ions.
Metallic Bond Force of attraction that holds metals together.
Octet Rule Atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas, usually eight valence electrons.
Valence Electron Electron in the highest occupied energy level of an atom.
Created by: heather4354
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