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Atomic theory pt.2

TermDefinition
Valence electrons the electrons farthest from the nucleus, they are responsible fro atoms forming compounds.
Molecule 2 or more atoms chemically combined
Compound 2 different atoms chemically combined Examples H2O, NH3
mixture a combination of 2 or more different atoms or molecules that are not chemically combined. Example chocolate milk, strawberry smoothie.
covelant bond chemical bond between 2 non metals
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.
Element A pure substance (one type of atom)
Alkali metals Very reactive, loosely bound electrons.
Alkali Earth metals Reactive, 2 valence electrons
Transition All highly reactive, Have a lot of electrons
Halogens Poor conductors, 7 electrons in outer shell.
Inert Gases Not reactive, 8 valence eletrons.
Created by: tf63126
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