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| those electrons that have the highet energy level and are geld most loosely |
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| represents the number or valence electrons of an atom. it includes the symbol for the element surrounded by dots.each dot stands for one valence electron. |
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| the force or attraction between two positive and negative ions. they are formed as a result of the attraction. |
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| a compound that consist of positive and negative ions |
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| the chemical bond formed when two atoms share electrons |
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| a compound that is composed of molecules |
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| is a short easy way to show a chemical reaction |
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| mass stays the same in this chemical reaction |
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| three types of chemical reactions |
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| synthesis decomposition replacement |
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| what are the physical properties of metals? |
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| luster, malleability, ductility, and conductivity |
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| the ability of an object to transfer heat |
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| the ability to transfer electric current |
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| what are the four classes of organic compounds required by living things ? |
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| carbohydrates, protein, lipuds, nucleic acids |
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| an energy rich organic comund made of ekements carbon, hydrogen and oxygen |
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