Classification, Changes, State of Matter Flashcards
what are the two (2) classifications of matter?
(1) pure substance
(2) mixtures
under pure substance (2)
elements
compounds
under mixtures (2)
homogeneous
heterogeneous
have a distinct physical and chemical properties/can be elements or compounds
fixed composition
substance
made up of only 1 type of atom
ex: hydrogen (H)
carbon (C)
elements
made up of 2 or more elements
water (H2O)
carbon dioxide (Co2)
methane (CH4)
ex: table salt (NaCi)
compounds
made up of 2 or more pure substances
can be homogeneous or heterogeneous
mixtures
same (also known as solution)
homogeneous
many
heterogeneous
what are the three (3) homogeneous classifications?
- gas - gas; air
- liquid - liquid; vinegar
- solid - solid; alloy
what are the two (2) phases or composition of heterogeneous classifications?
- suspensions
- colloids
solid to liquid
melting
liquid to solid
freezing
liquid to gas
evaporation
gas to liquid
condensation
solid to gas
sublimation
gas to solid
deposition
measure the amount of mass in a given amount of volume
density
describe how it feels like smooth, hard, and rough
texture
examples of chemical property
reactivity with water
oxidation
what property can be observed without changing/does not change the composition of the substance?
physical property
what property depends upon the amount of substance?
extensive property
what property can be observed when a substance is reacting with something else?
chemical property
what characteristic does not depend upon the amount of a substance?
intensive property
can be separated by physical means
mixtures
cannot be separated by physical means
substance
