Matter and Energy Unit 2

Intensive Property
properties that do not depend on the amount of substance is formed
EX:color, boiling point, density
Extensive Property
properties that do depend on the amount of subtance present
EX: length, mass, volume
Elements
a group of the same type of atoms
Compounds
a substance in which atoms of two or more elements are CHEMICALLY combined
Mixture
something with 2 or more substances PHYSICALLY combined
Pure Substances
always had the same composition
EX: lead, oxygen, water, carbon dioxide
Homogenous
composition is the same throughout
Distillation
seperation of liquids based on differences in boiling point
Filtration
seperation based on particle size
Chromatography
used when mixture is a composed of two materials with different affinities for a stationary phase
Mega-M-million
1Mm= 1,000,000m
Kilo-thousand
1km= 1,000m
Centi- hundredth
100cm=1m
mili- m
1,000mm=1m
micro-millionth
1,000,000un=1m
nano-billionth
1,000,000,000nm=1m
percent error
(accepted- measured/accepted)x 100
x

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