MSU CHM 160 Chapter 1 Terms

Chemistry
study of the composition, structure, and properties of matter and energy and changes that matter undergoes
Matter
anything that occupies space and has mass
Pure Substance
One type of substance
definite (constant) composition and distinct properties
Cannot be separated by physical processes
Elements
Cannot separate into simpler substance by chemical means
Compounds
Can separate into simpler substance by chemical means
Mixture
Two or more types of substances
Variable composition
Can separate by a physical process
Homogenous
Uniform composition
Heterogeneous
Nonuniform composition
Solid
particles packed close, no movement between atoms
liquid
particles somewhat close, some movement (energy)
Gas
very little attraction between particles and lots of movement
Physical Properties
description by senses, shape, color, odor, etc
Pysical Change
new form of old substance, no new sunstances formed
Chemical change
old substance destroyed
new substance formed
Chemical properties
list of chemical changes possible
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