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20 terms

Science Chapter 9

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element
one type of atom
compound
2 or more types of atoms combined through a chemical reaction creates a new substance, cannot be seperated by physical means
mixtures
2 or more substances that are physically combined no new substances, can be seperated by physical means
unsaturated
a solution that is capable of dissolving more solute more solute can be added
saturated
a solute with the max amount of solute
supersaturated
a solution that contains more than max amount of solute that it can hold unstable
concentrated
a solution in which the amount of solute is less than the max amount the solvent can hold
dilute
a solution in which the amount of solute is much less than the max amount the solvent can hold ex.-tea
property
a characteristic that is used to identify a substance every substance has a unique combination of properties
physical property
any characteristic of a material that can be observed without changing the composition of the substance ex.-color, shape, size, density, melting point, boiling point
density
the ratio of mass and its volume
chemical properties
a property of a substance that indicates whether can undergo a certain chemical change
chemical change
a change that alters the chemical composition of a substance new substance found ex.-flammable or combustible, bubbles, changes color, corrosive, rapid production of energy
Law of Conservation of Mass
the mass of all substances before a chemical change, is equal to the mass after the chemical change
homogeneous mixture
a mixture in which different materials are blended evenly so that the mixture is the same throughout; also called a solution
heterogeneous mixture
a mixture in which different parts can be easily distinguished
colloid
a heterogeneous mixture containing tiny particles that never settle out; for example, milk and gelatin
suspension
a heterogeneous mixture containing a liquid in which larger particles eventually settle out
solvent
the substance that dissolves a solute
solute
the substance being dissolved in a solvent