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Chem Test 2

Terms in this set (35)

Matter
Anything that has mass and takes up space
Pure Substance
A substance that has uniform and unchanging composition
Physical Properties
Characteristics that can be observed or measured without changing the sample's composition
Color
Physical Property
Texture
Physical Property
Boiling Point
Physical Property
4 States of Matter
solid, liquid, gas, plasma
Solid
Definite shape and volume
Liquid
Indefinite shape and definite volume
Gas
Indefinite Shape and indefinite volume
Two types of Physical Properties
Intensive and Extensive
Intensive properties
independent on the amount of substance present (it doesn't matter)
Extensive properties
Dependent on the amount of substance present
Chemical Properties
Ability or inability of a substance to combine with or change into one or more substances
Physical Change
Physical properties of a substance are altered without changing the composition
Solid to Liquid
Melting
Solid to Gas
sublimation
liquid to solid
freezing
liquid to gas
vaporization
gas to liquid
condensation
gas to solid
deposition
chemical change
One or more substances change into something new
Indications of a chemical change
Gas released, Precipitate forming, major color change, energy change
Law of Conservation of Mass
Matter cannot be created nor destroyed
Elements
Pure substances that cannot be separated into smaller substances
Compounds
Consist of a combination of two or more elements chemically combined
Mixture
Combination of two or more pure substances in which each substance keeps its individual chemical properties
Homogeneous Mixture
Substances are uniformly distributed; all regions are identical in their composition and properties
Heterogeneous Mixture
A mixture of substances that are not evenly distributed; individual substances remain distinct
Solution
Homogeneous Mixture
Colloid
Heterogeneous Mixture
Suspension
Heterogeneous Mixture
Alloy
Mixture of elements that have metallic properties (homogeneous mixture of metals)
Density
Mass per unit volume
When adding with Sig Figs, what digits are taken into consideration?
The ones after the decimal
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