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Atomic theory pt.2
Term | Definition |
---|---|
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 | Chemical bond between a metal and non metal |
Octet rule | Elements are stable when their valence shell is full. This can done with 8 or in some cases 2. |
Alkali Metals | They react quickly with water, And they lose luster quickly. They have 1 valence electron. |
Alkali Earth Metals | They react with water. They have 2 valence electrons. |
Transition Metals | They don't react that much. They conduct heat and electricity. They have 2 eletrons |
Halogens | They are toxic and they react quickly. |