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Atomic theory P2
Atomic theory
Term | Definition |
---|---|
Valence electrons | the electrons farthest from the nucleus; they are responsible for atoms forming compounds. |
Molecule | to 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 nonmetals. |
Ionic bond | chemical bond between a metal and a nonmetal. |
Octet rule | elements are stable when their valence shell is full. This can be done with 8 or in some cases 2. |
Alkali Metals | reactive, and has 1 valence electron |
Alkali Earth Metals | they react with water, and have 2 valence electrons |
Transition | they are less reactive, and the number of valence electrons is unknown |
Halogens | they're toxic, and have 7 valence electrons |
Inert Gases | they're quite stable, and have 8 valence electrons |