Chapter 2 Vocabulary

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A measure of the amount of matter that an object contains; the SI base unit of mass is the kilogram.


A measure of the space occupied by a sample of matter.

Extensive Property

A property that depends on the amount of matter in a sample.

Intensive Property

A property that depends on the type of matter in a sample, not the amount of matter.


Matter that has a uniform and definite composition, either an element or a compound; also called pure substance.

Physical Property

A quality or condition of a substance that can be observed or measured that flows, has a fixed volume, and an indefinite shape.


A form of matter that has a definite shape and volume.


A form of matter that flows, has a fixed volume, and an indefinite shape.


A form of matter that takes the shape and volume of its container; a gas has no definite shape or volume.


Describes the gaseous state of a substance that is generally a liquid or solid at room temperature.

Physical Change

A change during which some properties of a material change, but the composition of the material does not change.


A physical blend of two or more substances that are not chemically combined.

Heterogeneous Mixture

A mixture that is not uniform in composition, components are not evenly distributed throughout the mixture.

Homogeneous Mixture

A mixture that is uniform in composition, components are evenly distributed and not easily distinguished.


A homogeneous mixture; consists of solutes dissolved in a solvent.


Any part of a sample with uniform composition and properties.


A process that separates a solid from the liquid in a heterogeneous mixture.


A process used to separate dissolved solids from a liquid, which is boiled to produce a vapor that is then condensed into a liquid.


That simplest form of matter that has a unique set of properties; an element cannot be broken down into simpler substances by chemical means.


A substance that contains two or more elements chemically combined in a fixed proportion.

Chemical Change

A change that produces matter with a different composition than the original matter.

Chemical Symbol

A one- or two- letter representation of an element.

Chemical Property

The ability of a substance to undergo a specific chemical change.

Chemical reaction

A change in which one or more reactants change into one or more products, characterized by the breaking of bonds in reactants and the formation of bonds in products.


A substance present at the start of the reaction.


A substance produced by the reaction.


A solid that forms and settles out of a liquid mixture.

Law of conversation of mass

In any physical change or chemical reaction, mass is conversed, mass can be neither created nor destroyed.


Physical Changes can be classified as:


Three states of matter:


Two types of mixtures:


What can be broken down into simpler substances?


If the composition of a material is fixed, the material is a:

Chemical Symbols

What do Chemists use to represent elements?

Chemical Formulas

What do Chemists use to represent compounds?

Transfer of energy/Change in Color/Production of a gas/Formation of a precipitate

What happens in a chemical change?

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