| Term | Definition |
|---|
| chemistry | the study of the composition, structure, and properties of matter and the changes it undergoes |
| chemical | a substance that has a definite compostion |
| mass | is the measure of the amount of matter |
| matter | anything that takes up space and has mass |
| atom | the smallest unit of an element that retains the properties of the element |
| element | a pure substance that is made up only one kind of atom |
| compound | a substance that is made from the atoms of two or more elements tht are chemically bonded |
| Extensive properties | properties that depend on the amount of matter that is present |
| intensive properties | properties that do not depend on the amount of matter |
| physical change | a change in a substance that does not involve a change in the identity of the substance |
| change of state | a physical change of a substance from one state to another |
| solid | matter that has a definite shape and volume |
| liquid | matter that does not have a definite shape but does have a definite volume |
| gas | matter that has no define shape or volume |
| plasma | matter at a high temperature in which the atoms have lost their electrons |
| chemical property | relates to a substance's ability to undergo changes that transform it into two or more new substances |
| reactants | substances that react in a chemical reaction on the left of the --> |
| products | substances that are formed in a chemical reaction on the right side --> |
| mixture | a blend of two or more kings of matter, each of which retains its own identity and properties |
| homogenous | mixtures that are uniform in composition |
| heterogenous | mixtures that are not uniform in composition |
| groups | vertical columns in the periodic table |
| families | vertical coumns in the periodic table |
| periods | horizaontal rows in the periodic table |
| metal | an element that is a good conductor of heat and electricity |
| non-metal | an element that is not a good conductor of heat and electricity |
| metalloid | an element that has characteristics of both a metal and a non-metal |
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