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(state of matter)
high pressure, dense, vibrate
Solid
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(state of matter)
indefinite shape, definite volume
Liquid
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(state of matter)
low pressure
Gas
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(state of matter)
high temp, far apart particles
Gas
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(state of matter)
charged particles mixed with gas phase, extreme temps
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Property that can be observed without altering the substance
Physical property
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Property that describes the substance's ability to undergo a change cannot be observed without altering the substance
Chemical property
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A change that does not alter chemical identity, usually reversable
Physical change
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A change in which a new substance with new chemical properties is formed
Chemical change
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(mixture)
uniform composition, will not settle out
Homogeneous
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(mixture)
variable composition, can settle out, differences detected with a microscope
Heterogeneous
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every sample has the same properties and same exact composition, cannot be seperated by physical means
Pure substances
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(Law)
energy cannot be created or destroyed during any chemical or physical change
Law of conservation of energy
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energy absorbed by the system
Endothermic
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Energy released into the surroundings
Exothermic
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A measure of the amount of matter in an object
Mass
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A measure of the gravitational force on an object
Weight
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A combination of 2 or more units
Derived unit
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The amount of space and object occupies
Volume
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The closeness of the measurement to a theoretical or known value
Accuracy
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Calculation related to accuracy
% error
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Instrument precision,
the repeatability of a data set or the closeness or a measurement to the average
Precision
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Calculation related to precision
Average deviation
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Specific substances always contain the same elements in the same ratio by mass
Law of definite proportions
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When multiple compounds of the same 2 elements exist, the masses of the second element combined with a certain mass of the first is always a ratio of small whole numbers
Law of multiple proportions
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(experiment)
Cathode Ray Tube
J. J. Thomson
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(experiment)
Millikan Oil Drop Experiment
Robery Millikan
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(experiment)
Gold Goil Experiment
Rutherford
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Planetary atomic model
Rutherford & Bohr
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Atomas of the same element that have different numbers of neutrons
Isotopes
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The mass in grams of one mole of a pure substance
Molar mass
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