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