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Chem 2.1-2.2

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
Created by: BB2424



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