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20 Cards in this Set

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  • Back
Three principal states of matter
solid, liquid and a gas
Characteristic Property Examples
boiling point and melting point
Atom
the smallest particle of an element
Molecule
group of atoms that are joined together and act as a single unit
Volume
length x width x hieght: mabe be measured in cubic cm
Mass
the amount of matter in an object - not weight
Density
measurement of how much mass is in a given volume
The force of gravity
determines the weight of something
Mixture
when two or more substances are mixed together but not chemically combined (ex. sand)
Solution
A really well mixed mixture (ex. juice)
Pure Substance
something that is made of one kind of matter with definate properties
Element
pure substances that cannot be broken down into other substances
Compound
pure substance that is made up of 2 or more elements that are chemically bonded
Chemical Bond
force that holds 2 atoms together
Physical change
the form of a substance is changed, but it's idenity stays the same
Chemical Change
subtances combine or break apart to from new substances
Dalton's Ideas
*All atoms are alike in an element
*Atoms of an element have their own unique mass
*Atoms cannot be broken down into smaller pieces
*Atoms of 2 or more elements can combine to make a compound
*The masses of elements in a compound are always in a constant ratio
Ore information
The useable metal in deposits is called ore. An electrode is used to attract metal in ore. Iron is seperated from ore by heating it with carbon dioxide.
Find the density of an object with a mass of 22 grams and a volume of 11cm.
2 g/cm (to the third power)
Common Units for Mass, Volume, and Density
cm cubed, cm squared, g/cm cubed