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Atomic Theory Part 2

TermDefinition
Valence electrons The electrons farthest from the nucleus; they are responsible for atoms forming compounds.
Molecule 2 or more atoms that are chemically combined.
Compound 2 different atoms chemically combined.
Mixture A combination of 2 or more 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 Elements with 1 valence electron, found on far left of periodic table. Highly reactive to water.
Alkali Earth Metals Elements with 2 valence electrons, found on left of periodic table. React to water when heated.
Transition Metals Elements in the middle of periodic table, less reactive.
Halogens Elements with 7 valence electrons, found on right of periodic table. Reactive and electronegative.
Inert Gases Elements with 8 valence electrons and one with 1 valence electron. Found on far right of periodic table, non-reactive gases.
Created by: aMartinez-Lopez
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