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chemistry test review #1
58 cards·by smith_megan98
characteristic that can be observed/ measured but does NOT change sample (mass,density)
physical property
Substances ability to combine with or change into a different substance
(corrosion,reactivity)
chemical property
anything that takes up space
matter
mass chemical or physical
physical
flammability chemical or physical
chemical
corrosion chemical or physical
chemical
compressibility chemical or physical
physical
volume chemical or physical
physical
density chemical or physical
physical
viscosity chemical or physical
physical
reactivity chemical or physical
chemical
doesnt depend on he amount of a substance present (density, color)
intensive
depends on the amount of a substance present (volume, length)
extensive
list 4 indications that a chemical change occurred
color change gas evolution formation of a precipitate (solid from 2 liquids) energy change
dissolving salt in water chemical or physical change
pc
digesting food chemical or physical change
cc
grinding chalk into powder chemical or physical change
pc
burning gasoline chemical or physical change
cc
bubbling chemical or physical change
cc
melting ice chemical or physical change
pc
leaves changing colors chemical or physical change
cc
melting a candle into wax chemical or physical change
pc
chemical reaction releases energy. envir. feels HOT
exothermic
chemical reaction absorbs energy envir. feels COLD
endothermic
solids compressibility
imcompressible
liquids compressibility
imcompressible
gas compressibility
compressible
horizontal rows on the period table
period
organized the PT based on atomic mass, left space for undiscovered elements
mendeleev
vertical columns on the PT sometimes called families
group
reorganized the period table based on atomic number
moseley
group that has one valence electron
alkali metal
group that contains Calcium and Magnesium
alkaline earth metal
group number 17
halogen
4 properties of metal
lustrous malleable ductile conductors
2 properties of nonmetals
insulators gases/ brittle solids
properties of both metal and nonmetals (boron, silicon, arsenic)
metalliod
made up of two or more pure substances
mixture
a single type of atom
element
also, known as a solution
homogenous
suspensions and colloids
heterogeneous
more than one element combined
compound
how close a measured value is to an accepted value
accuracy
how close a series of measurements are to on a other
precision
elements found on the left side of the PT
metal
how many valence electrons does calcium have
2
arong is found in what period and group
3 & 18
halogen has what charge
-1
2 pure substances
element and compound
mixture that has large particles that will settle out if left undisturbed
suspension
solution is an example of
homogeneous mixtures
solid to liquid
melting
gas to liquid
condensation
solid to gas
sublimation
use boiling points to separate
distillation
separates color
chromatography
separation by the use of a filter
filtration
separation by evaporation
crystallization