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Chapter 15 vocab.
Term | Definition |
---|---|
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 substance blended evenly throughout |
solution | homogenous 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 | heterogenous 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 |