states of matter+ Flashcards
states of matter, matter vocabulary, properties of matter, evidence of a chemical change
atom
basic unit of matter
element
simplest substance, only one type of atom
living things are made of
CHNOPS (carbon) (hydrogen) (nitrogen) (oxygen) (phosphorus) (sulfur)
allotrope
a different form of an element (ex. carbon (graphite and diamond))
compound
composed of at least two different atoms BONDED together
mixture
two or more substances PHYSICALLY mixed together
homogeneous mixture
uniformly distributed substances (atmosphere)
heterogeneous mixture
not evenly distributed, visually different (blood)
distillation
separation technique by boiling one substance out (homogeneous mixtures)
filtration
separation technique of a solid and liquid (heterogeneous mixtures)
solid
fixed volume, fixed shape
liquid
fixed volume, variable shape
gas
variable volume, variable shape
physical property
can be observed without changing chemical identity (mass)
physical change
affects only physical properties (ice to water)
chemical properties
observed when a substance reacts
chemical change/reaction
process that produces one or more new substances
5 evidences of chemical change?
1) gas is released
2) precipitate is formed
3) heat is absorbed or released
4) light is released
5) color change
precipitate (ppt)-
insoluble solid produced when two clear liquids react
chromatography
process used to separate components of a mixture
absorbent
attracts and absorbs the materials to be separated
solvent
carries the material to be separated
