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Atomic Theory P.2
Term | Definition |
---|---|
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 |