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Chemistry
Chapter 7 Vocabulary
Term | Definition |
---|---|
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. |