Classification of Matter

Chem Test 2/20

gas

particles are independent, very far apart, with no attractive forces between them. Fill total volume of container. Has most kinetic energy

solid

strong attractive force between particles lock them into a fixed arrangements.

liquid

particles make & break temporary attractions with each other. Particles slip & slide over one another & take shape of container

matter

anything that has mass & takes up space

Pure substance

All particles are the same throughout a sample — composition is fixed or definite. Fixed intrinsic physical properties. CANNOT be separated physically.

elements

PURE SUBSTANCE: cannot be broken down into simpler substances by physical or chemical methods; smallest particle is called a atom.

compounds

PURE SUBSTANCE: substances with a definite composition & mass ratio that can be broken down into simpler substances by chemical means

mixture

Composition is variable. Physical properties vary depending on exact composition. CAN BE PHYSICALLY SEPERATED

homogenous MIXTURE

a mixture with one phase throughout the sample, different types of particles are not able to be seen

heterogenous MIXTURE

a mixture with more than one phase throughout the sample, different types of particles are able to be seen