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Atomic Theory P.2

TermDefinition
Valence electrons The electrons farthest from the nucleus ; they are responsible for atoms forming compound .
Molecule 2 or more atoms chemically combined .
Compound 2 different atoms chemically combined .
Mixture A compound of 2 or more different atoms or molecules that are not chemically combined .
Covalent bod Chemically bond between or more non-metals .
Ionic bond Chemical bond between a metal and non-metals
Octet rule Elements are stable when their valence shell is full. his can be done with 8 or with some cases 2 .
Alkali metals They are soft, they react with air and are able to cute. Li,Na, K Rb ,Cs Fr
Alkali earth metals They react with water Be, Mg, Ca
Transition Hard and shiny and used to make tools Fe, Co,Ti,Ni,Zn
Halogens They are the most toxic and reactive Li, Cl,Br,I,At
Inert gases They don't form compound He,Ne,Ar,Kr,Rn
Created by: am61952
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