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Chemistry

Chapter 1

TermDefinition
Chemistry - Long Definition The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular system
Chemistry - Short Definition The science dealing with the composition of matter and the changes in composition that matter undergoes.
Scientific Method Collect the facts or data, formulate a hypothesis, plan and do additional experiments to test the hypothesis, modify the hypothesis.
Hypothesis A tentative explanation of certain facts that provides a basis for further experimentation.
Theory An explanation of the general principles of certain phenomena with considerable evidence or facts to support it.
Scientific Laws Simple statements of natural phenomena to which no exceptions are known under the given conditions.
Matter Anything that has mass and occupies space.
Solid Has a definite shape and volume, with particles clinging rigidly to one another.
Amorphous (Solids) Without shape or form.
Liquid Has a definite volume but not a definite shape, with particles that stick firmly but not rigidly.
Gas Has indefinite volume and no fixed shape, with particles that move independently of one another.
Substance A particular kind of matter with a definite, fixed composition.
Homogeneous Matter is uniform in appearance and has the same properties throughout.
Heterogeneous Matter consisting of two or more physically distinct phases.
Phase A homogeneous part of a system separated from other parts by physical boundaries.
System Simply the body of matter under consideration.
Mixture A material containing two or more substances and can be either heterogeneous or homogeneous.
Common Solids Aluminum, Copper, Gold, Polyethylene, Salt, Sand, Steel, Sulfur
Common Liquids Alcohol, Blood, Gasoline, Honey, Mercury, Oil, Vinegar, Water
Common Gases Acetylene, Air, Butane, Carbon dioxide, Chlorine, Helium, Methane, Oxygen
Physical Properties of Solids State Solid, Shape Definite, Volume Definite, Particles rigidly clinging; tightly packed, Compressibility Very slight.
Physical Properties of Liquids State Liquid, Shape Indefinite; Volume Definite; Particles Mobile/adhering; Compressibility Slight.
Physical Properties of Gases State Gas; Shape Indefinite; Volume Indefinite; Particles Independent of each other and relatively far apart; Compressibility High.
Created by: iswest94
 

 



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