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Chapter 2: Matter
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24
Chemistry
11th Grade
09/29/2012

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Term
Matter
Definition
The material of the universe.
Term
Atom
Definition
The fundamental unit of which elements are composed.
Term
Compound
Definition
A substance with constant composition that can be broken down into elements by chemical processes.
Term
Molecule
Definition
A bonded collection of wo or more atoms of the same element or different elements.
Term
Element
Definition
A substance that cannot be decomposed into simpler substances by chemical or physical means.  It consists of atoms.
Term
Graphite
Definition
Black, slippery material made up of carbon atoms.
Term
Diamond
Definition
A brilliant, hard gemstone made up of carbon atoms.
Term
Buckminsterfullerene
Definition
Made up of a tetrahedron of C60 molecules.
Term
Solid
Definition
One of three states of matter; has a fixed shape & volume.
Term
Liquid
Definition
One of the three states of matter; has a fixed volume but takes the shape of its container.
Term
Gas
Definition
One of the three states of matter; has neither fixed shape nor fixed volume.
Term
Physical Properties
Definition
Odor, color, volume, state, density, melting point, boiling point of a substance.
Term
Chemical Properties
Definition
The ability of a substance to change to a different substance.
Term
Physical Change
Definition
A change in the form of a substance, but not in its chemical nature; chemical bonds are not broken in a physical change.
Term
Chemical Change
Definition
The change of a substance into other substances through a reorganization of the atoms; a chemical reaction.
Term
Reaction
Definition
Chemical changes.
Term
Mixture
Definition
A material of variable composition that contains two or more substances.
Term
Alloy
Definition
A substance that contains a mixture of elements & has metallic properties.
Term
Pure Substance
Definition
A substance with constant composition.
Term
Homogeneous Mixture
Definition
A mixture that is the same throughout-a solution.
Term
Solution
Definition
A homogeneous mixture.
Term
Heterogeneous Mixture
Definition
A mixture that has different properties in different regions of the mixture.
Term
Distillation
Definition
A method for separating the components of a liquid mixture that depends on differences in the ease of vaporization of the components.
Term
Filtration
Definition
A method for separating the components of a mixture containing a solid & a liquid.
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