volume
a measure of the space occupied by the object
mass
the amount of matter that an object contains
substance
matter that has a uniform and definite composition
physical property
a quality or condition of a substance that can be observed or measured without changing the substance's composition
solid
matter that has a definite shape and volume
liquid
matter that has a definite volume and takes the shape of its container
gas
matter that takes both the shape and volume of its container
vapor
the gaseous state of a substance that is generally a liquid or solid at room temperature
physical change
a change to a material that does not change its composition
extensive property
depends on the amount of matter in a sample
intensive property
depends on the type of matter in a sample
mixture
a physical blend of two or more components
heterogeneous mixture
a mixture that is not uniform in composition
homogeneous mixture
a mixture in which the composition is uniform throughout
solutuion
another name for a homogeneous mixture
phase
any part of a sample with uniform composition and properties
distillation
separation of a liquid by boiling followed by condensation
Filtration
a method for separating a solid from a liquid in a heterogeneous mixture
element
the simplest form of matter that has a unique set of properties
compound
contains 2 or more elements combined chemically
chemical symbol
one or two letters that represent an element
chemical change
a change that produces matter with a different composition than the original matter
chemical reaction
process in which one or more substances change into one or more new substances
reactants
starting substance in a chemical reaction
product
a substance formed in a chemical reaction
chemical property
the ability of a substance to undergo a specific chemical change
precipitate
a solid that forms and settles out of a liquid mixture
Law of Conservation of Mass
mass of product is always equal to the mass of the reactants
periods
horizontal rows
groups
vertical rows
chemical formulas
used to represent compounds
matter
Anything that has mass and takes up space
space
measured by the volume of an object