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Chapter 2 Vocabulary

Pure substance Simply a substance.
Element A substance that cannot be broken down into simpler substances.
Atom The smallest particle of an element.
Compound A substance that is made from two or more simpler substances and can be broken down into those simpler substances.
Heterogeneous mixture The parts of the mixture are noticeably different from one another.
Homogeneous mixture The substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another.
Solution When substances dissolve and form a homogeneous mixture.
Suspension A heterogeneous mixture that separates into layers over time.
Collid Contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension.
Physical property Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.
Viscosity The tendency of a liquid to keep from flowing, the resistance to flowing
Condusctivity A material's ability to allow heat to flow.
Malleability The ability of a solid to be hammered without shattering.
Melting point The temperature at which a substance changes from solid to liquid.
Boiling point The temperature at which a substance boils.
Filtration A process that separates materials based on the sizeof their particles.
Distillation A process that separates the substances in a solution based on their boiling points.
Physical change Occurs when some of the properties of a material change, but the substances in the material remain the same.
Chemical property Any ability to produce a change in the composition of matter.
Flammability A material's ability to burn in the presence of oxygen.
Reactivity The property that describes how readily a substance combines chemically with other substances.
Chemical change Occurs when a substance reacts and forms one or more new substances.
Precipitate Any solid that forms and separates from a liquid mixture.
Created by: kayla.brady