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15 Cards in this Set

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matter
the physical material of the universe, anything that has a mass and takes up space
property
any characteristic that allows us to recognize a particular type of matter and distinguish it from the rest.
element
over a hundred very basic or elementary substances that combine to create the great variety of matter in the universe
atoms
the almost infinitesimally small building blocks of matter
molecules
two or more atoms joined together in specific shapes
states of matter
physical state of matter, gas, liquid, solid
composition
element, compound, mixture
pure substance
matter that has distinct properties and a composition that doesn't vary from sample to sample.
element and compound
element one particular type of atom, compound two or more kinds of elements
mixtures
combinations of two or more substances in which each substance retains its own chemical identity
law of constant composition or law of definite proportions
observation that the elemental composition of a pure compound is always the same
physical properties
can be measured without changing the identity and composition of the substance.
chemical properties
describe the way a substance may cahge, or react, to form other substances. example: flammability
intensive properties
do not depend on the amount of the sample being examines
extensive properties
depend on the quantity of the sample (mass and volume)