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36 Cards in this Set

  • Front
  • Back
basic research
carried out to increase knowledge
applied research
to solve a problem
technological development
to improve quality of life
mass
measure of amt of matter
matter
anything that has mass & takes up space
smallest unit of element
atom
element
pure substance that can't be broken down
compound
substance that can be broken down
extensive properties
depends on the amt of substance

mass & volume
intensive properties
dont depend on amt of substance

melting pt, boiling pt, density
physical characteristics
any substance that can be observed/measured w/o changing I.D.
what 2 things cannot be physical characteristics?
sound/shape
does the change of state affect the i.d. of the substance?
no way hose!
solid
definite volume & shape
liquid
definite volume but indefinite shape
gas
indefinite volume & shape
what 2 things remain the same before and after a chemical change?
amt of matter & energy
condensation
result of gas turning to water b/c of cooling
reactants
the 2 things you put together to create a product
conservation law of mass
chemical change doesn't change mass before or after
mixture
combo of 2 or more substances together that retain their identity

composition isnt set
homogeneous mixture
uniform in composition/evenly proportioned
aka solution
heterogeneous mixture
not uniform/evenly proportioned
Pure substance
fixed composition
either elements or compounds
vertical columns of periodic table
groups
aka families
groups
horizontal rows of elements
periods
metal
good electrical & heat conductor

most are malleable, ductile, & have high tensile strength
malleable
can be hammered into thin sheets
ductile
can be drawn into fine wire
tensile strength
ability to resist breaking when pulled

reason for ductile & malleable
another word for shiny
luster
what are the only elements w/ color?
copper & gold
nonmetals
gases at room temp
non-conductors
brittle
metalloid
solids at room temp
characteristics of metals & nonmetals
noble gases
unreactive/inert