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Atomic Theory P2
Question | Answer |
---|---|
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 |