chemical change

a process involving one or more substances into new substances, also called a chemical reaction

chemical property

the ability or inability or a substance to combine with or change into one or more new substances

chromatography

a technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of another material

compound

a chemical combination of 2 or more different elements; can be broken down into simplier substances by chemical means and has properties different from its component elements

crystallization

a separation technique that produces pure solid particles of a substance from a solution that contains the dissolved substance

distillation

a technique used to physically separate most homogeneous mixtures based on the differences in the boiling points of the substances involved

element

a pure substance that cannot be broken down into simplier substances by physical or chemical means

extensive properties

a physical property that is Dependant upon the amount of substance present

filtration

uses a porous barrier to separate a solid from a liquid

gas

a form of matter that flows to conform to the shape of its container, fills the container's entire volume and is easily compressed

heterogenous mixture

one that does not have a uniform composition and in which the individual substances remain distinct

homogeneous mixture

one that has a uniform composition thorughout and always has a single phase; also called a solution

intensive properties

a physical property that remains the same no matter how much of a substance is present

law of conservation of mass

states that mass in neither created nor destroyed during a chemical reacition but is conserved

law of definite proportion

states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass

law of multiple proportions

states that when different compounds are formed by the combination of the same elements, different masses of one element combine with the same mass of the other element in a ratio of small whole #'s

liquid

a form of matter that flows has a constant volume and takes the shape of its container

mixture

a physical blend of 2 or more pure substances in any proportion in which each substance retains its individual properties, can be separated

percent by mass

a % determined by the ratio of the mass of each element to the total mass of the compound

periodic table

chart that organizes all known elements into a grid of rows (periods) and columns (families) arranged by increasing atomic #

physical change

alters the physical properties of a chemical but not changes its composition

solid

matter that has its own definite shape and volume, is compressible and expands only slightly when heated

solution

uniform mixture that may contain solids, liquids, or gases, homogeneous mix.

states of matter

physical forms in which all matter naturally exists; solid liquid gas

substance

form of matter that has a uniform and unchanging composition; also known as a pure substance

vapor

gaseous state of a substance that is a liquid or a solid at room tempurature