7-2+vocab.

7-2 breanna mitchell

Chemical changes - a process involving one or more substances change into new substances. Chemical property - the ability or inability of a substance to combine with. Chromatography -a technique that is used to seperate the components of a mixture based on the tendency of each component to travel. Compound -a chemical combination of two or more different elements. Crystallization - a separation technique that produces pure soild particles of a substance from a solution that contain the dissolved substance. Distallation -a technique that can be used to physcially seperate most homogeneous mixture based on the differences in the boiling points of the substances involved. Element- a pure substance that cannot be broke down into simpler substances by physical or chemical mean. Extensive properties - a physical property, such as mass,lenght, and volume, that is dependent upon the amount of substance present. Filtration- a technique that use a porous barries to seperate a soild from a liquid. Gas- a form of matter that flow to conform the shape of its container. Heterogeneous mixture - one that does not have uniform composition and in which the individual substances remain disinct. Homogeneous -one that has uniform compostin throughout and always has a single phase;also calleed a solution. Intensive property - A physical property that remains the same no matter how much of the substance in present. Law of Consevation of mass - state that mass is niether created or destroyed during a chemical reaction, but conversed. Law of definite proportion - states that, regardless of the amount , a compound is always composed of the same element and some proportion by mass. Law of multiple proportion -state that when different compounds are formed by the combination of the same element. Liquid -a form of matter that flows, has a constant volume and takes shape of its container. Mixture- A physical blend of two or more pure substance in any proportion in which each substance retain its indivdual properties. Physical change - A type of change that alters the physical properties of a substance but does not change it comatpostion. Physical property - a characteristic of the matter that can be observed or measured without changing the sample compostion. Soild - a form of matter that has its own definite shape and volume. Solution- A uniform mixture that may contain soilds ,liquid or gases. State of matter -The physical form in which all matter naturally exists on earth. Substance- A form of matter that has a uniform and unchanging compostion. Vapor -gaseous state of substance that is a liquid or a soild at room temp.