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Chapter 2 Vocab


Pure Substance Matter that always has exactly the same compostition; an element or compound.
Element A substance that cannot be broken down into simpler substances.
Atom The smallest part of an element.
Compound A substance that is made from two or more simpler substances and can be broken down into the simpler substances.
Heterogeneous Mixture A type of mixture in which the parts of the mixture are noticeably different from one another.
Homogeneous Mixture A type of mixture in which the substances are so evenly distributed that is difficult to distinguish one substance in the mixture from another.
Solution A mixture that forms when substances dissolve and form a homogeneous mixture.
Suspension A heterogeneous mixture that separates into layers over time.
Colliod A mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in 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; Resistance to flowing.
Conductivity A material's ability to allow heat or electric charges 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; The temperature at which vapor pressure is equal to atmospheric pressure.
Filtration A process that separates materials based on the size of their particles.
Distillation A process that separates the substances in a solution based on their boiling points.
Physical Change A change that occurs when some properties of material change, but the substances in the material stay the same.
Chemical Property Any property that produces 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 Change that occurs when a substance reacts and forms one or more new substances.
Precipitate A solid that forms and separates from a liquid mixture.
Created by: Haley.Brinkman