Chapter 4- Compounds and Mixtures
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19 terms
Terms | Definitions |
|---|---|
 element | substance that cannot be chemically broken down into simpler substances |
| compound | substance made up of two or more elements that are chemically combined |
| mixture | two or more substances that have been physically combined |
| substance | any element or compound |
| molecule | smallest part of any substance that has all the properties of that substance |
| chemical bond | force of attraction that holds atoms together |
| valance electron | electron in the outermost energy level of an atom |
| ion | atom with an electrical charge |
| ionic bond | bond formed between atoms that have gained or lost electrons |
| covalent bonds | bond formed when atoms share electrons |
| organic compound | compound containing carbon |
| organic chemistry | study of organic compounds |
| structural formula | molecular model that uses straight lines to indicate bonds |
| polymers | large molecules that are formed by many smaller molecules |
| carbohydrates | sugars and starches |
| lipids | fats and oils |
| proteins | compounds used to build and repair body tissues |
| amino acids | building blocks of proteins |
| nucleic acids | compounds made up of carbon, oxygen, hydrogen, nitrogen, and phosphorus |
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