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.