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Chapter 15 vocab
chapter 15
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 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 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 substance in a mixture by evaporating a liquid and recondensing its vapor. |
chemical property | any characteristic of 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 substance present before a chemical change equals the mass of all the substance remaining after the change. |