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13 terms

Chemistry 521A - Chapter 7 Vocabulary

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Chemical formula
shows the kinds and numbers of atoms in the smallest representative unit of a substance
Valence electrons
electrons in the highest occupied energy level of an element's atoms
Electron Dot Structure
A diagram that shows valence electrons as dots
Octet Rule
In forming compounds, atoms tend to react so as to acquire the stable electron configuration of a noble gas
Halide ion
a negative ion formed when a halogen atom gains an electron
Formula Unit
the lowest whole-number ratio of ions in an ionic compound
Ionic bonds
the electrostatic attraction that binds oppositely charged ions together
Coordination Number
the number of ions of opposite charge that surround the ion in a crystal
metallic bonds
the attraction of free-floating valence electrons for positively charged metal ions
Ionic compounds
compounds composed of cations and anions
Alloy
a mixture of two or more elements, at least one of which is a metal
Anions
negatively charged ions
Cations
positively charged ions