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mass
measure of the amount of matter the object contains
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volume
meausre of the space occupied by the object
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extensive property
property that depends on the amount of matter in a sample (quantity, how much)
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intensive property
property that depends on the type of matter ina sample, not the amount of matter (structure, reaction itself)
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substance
matter that has a definite and uniform composition
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physical property
quality or condition of a property that can be observed or meausred without changing the substances composition
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solid
form of matter that has a definite shape and volume, doesnt depend on shape of container
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liquid
form of matter that has an indefinite shape, flows, yet has a fixed volume
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gas
form of mastter that takes both the shape and volume of its container
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vapor
describes gaseous state of a substance that is genereally a liquid or solid at room temperature
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physical change
some properties of a material change, but the compostion of the material does not change
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mixture
physical blend of two or more compounds
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heterogenous mixture
mixture in which the compostion is not uniform throughout
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homogenous mixture
mixture in which the composition is uniform throughtout. aka. solution
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phase
used to describe any part of a sample with uniform composition and properties.
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filtration
process that seperates a solid from a liquid in a heterogenous mixture
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distillation
a liquid is boiled to produce a vapor that is then condesnsed into a liquid
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element
simplest form of matter that has a unique set of properties ex. oxygen plus hydrogen
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compound
substance that contains two or more elements chemically combined in a fixed proportion ex. sucrose
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chenical change
change that produces matter with a different composition then the original matter. ex- heating
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chemical symbol
one or two letter symbol that represents an element
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period
horizontal row of the periodic table of elements
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group
each veritcal column
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chemical property
ability of a substance to undergo a specific chemical change. ex. ability to rust
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chemical reaction
one or more substances changes into one or more new substances
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reactant
substance present at the start of a reaction
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product
substance produced in the reaction
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precipitate
a solid that forms and settles out of a liquid mixture
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law of conservation of mass
states that in any physical change or chemcial reaction mass must be conserved. mass is neither created nor destroyed
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