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30 Cards in this Set

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  • Back
atom
smallest part of an element that has all the characteristics of that element
change of state
PHYSICAL change of a substance form one state to another
mixture
blend of two or more kinds of matter, each of which contain its own properties
chemical property
the ability to undergo changes and form new substances
chemical reaction/chemical change
a change when one or more substances are converted into different substances
compound
two or more elements chemically combined in a definite ratio
element
simplest form of matter; pure substance, cannot be broken down by ordinary chemical means;
extensive property
depends on amount of substane present (vloume, mass, amount of enerygy)
gas
neither definite volume nor definite shape
homogeneous mixture
the same throughtout
heterogeneous mixture
not uniform throughtout, mas many layers or boundaries
intensive property
does not depend on amount of substance (boiling point, density and ability to conduct energy and heat)
liquid
particles are not as close as in a solid and not as far apart as those in a gas; definite volume, but not definite shape- takes shape of container
mass
the measure of the amount of matter
matter
anything that has mass and takes up space
physical change
does not change the composition (identity) of the substance (cutting, grinding)
physical property
observed or measured without changing that substance
plasma
fourth state of matter in which aatoms lose their electrons
product
result of chemical reaction
pure substance
substance with a fixed composition
reactant
substances that rect to form a new substance
solid
particles packd tightly, definite volume and definite shape
solution
homogeneous mixture
chemical
any substance that has definite composition
chemistry
the study of structure, properties, and composition of matter and the changes it undergoes
family
vertical columns on periodic table
metal
good conductors of heat and electricity, mostly solid, malleable and ductile, on left side of staircase
metalloid
semiconductor; intermediate roperties of metals and nonmetals, ALWAYS GASES, located on the staircase (except aluminum)
nonmetal
on righ side of staircase on periodic table; do not conduct heat and electricity well, mostly gas at room temperature
period
horizontal rows of the periodic table