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Atomic Theory P2

TermDefinition
Valence Electron The electrons farthest from the nucleus; they are responsible for atoms forming compounds
Molecule 2 or more atoms chemically combined
Compound 2 different atoms chemically combined
Mixture A combination of 2 or more different atoms or molecules that are not chemically combined
Covalent Bond Chemical bond between 2 nonmetals
Ionic Bond Chemical bond between a metal and nonmetal
Octet Rule Elements are stable when their valence shell is full. This can be done with 8 or in some cases 2
Alkali Metals Very reactive, flammable. These elements have only one valence electron
Alkaline Earth Metals React with halogens. These elements have two valence electrons
Halogens They are very electronegative and reactive. These elements have seven valence electrons
Noble Gases/Inert Gases Very unreactive, rarely form compounds. These elements have eight valence electrons
Transition Metals Less reactive & conduct electricity. Most of these elements have two valence electrons
Created by: mr62377