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Chapter 15 Vocab.

TermDefinition
Substance Element or compound that cannot be broken down into simpler components and maintain the properties of the original substance.
Element Substance with atoms that are all alike.
Compound Substance formed from two or more elements in which the exact combination and proportion of elements is always the same.
Heterogeneous mixture Mixture such as mixed nuts or a dry soup mix, in which different materials are unevenly distributed and are easily identified.
Homogeneous mixture Solid, liquid, or gas that contains two or more substances blended evenly throughout.
Solution Homogeneous mixture that remains constantly and uniformly mixed and has particles that are so small they cannot be seen with a microscope.
Colloid Heterogeneous mixture whose particles never settle.
Tyndall effect Scattering of a light beam as it passes through a colloid.
Suspension Heterogeneous mixture containing a liquid in which visible particles settle.
Physical property Any characteristic of a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material.
Physical change Any change in size, shape, or state of matter in which the identity of the substance remains the same.
Distillation Process than can separate two substances in a mixture by evaporating a liquid and recondensing its vapor.
Chemical property Any characteristic of a substance, such as flammability, that indicates whether it can undergo a certain chemical change.
Chemical change Change of one substance into a new substance.
Law of conservation of mass States that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change.
Created by: ahindmon
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