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Chem 2.1-2.2
Question | Answer |
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chemistry | the scientific study of the composition, structure, and properties of matter and the changes that matter undergoes |
chemical | any substance that has a defined composition |
mass | measure of the amount of matter in an object |
matter | anything that has mass and takes up space |
atom | the smallest unit of an element that maintains the chemical properties of that element |
element | a substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number |
compound | a substance made up of atoms of two or more different elements joined by chemical bonds |
extensive property | property that depends on the extent or size of a system |
intensive property | property that does not depend on the amount of matter present, such as pressure, temperature, or density |
physical property | characteristic of a substance that does not involve a chemical change, such as density, color, or hardness |
physical change | change of matter from one form to another without a change in chemical properties |
change of state | the change of a substance from one physical state to another |
solid | the state of matter in which the volume and shape of a substance are fixed |
liquid | the state of matter that has a definite volume but not a definition |
gas | form of matter that does not have a definite volume or shape |
chemical property | property of matter that describes a substance's ability to participate in chemical reactions |
chemical change | a change that occurs when one or more substances change into entirely new substances with different properties |
chemical reaction | the process by which one or more substances change to produce one or more different substances |
reactants | substance or molecule that participates in a chemical reaction |
product | substance that forms in a chemical reaction |
mixture | combination of two or more substances that are not chemically combined |
homogenous | describes something that has a uniform structure or composition throughout |
solution | homogeneous mixture of two or more substances uniformly dispersed throughout a single phase |
heterogenous | composed of dissimilar components |
pure substances | a sample of matter, either a single element or a single compound, that has definite chemical and physical properties |