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Atomic Theory P2

Valence electrons 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 non-metals
Ionic bond A chemical bond between a metal and a non-metal
Octet rule Elements are stable when their valance shell is full. This can be done with 8 or some cases 2
Alkali metals They are soft, they are able to cut Li,Na,K,Rb,Cs,Fr
Alkali earth metals They react with water
Transition Hard and shiny and used to make tools
Halogens They are the most toxic and reactive
Inert gases
Created by: mm62260