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Chapter 15 Vocab
Term | Definition |
---|---|
Substance | simply a substance is a type of matter with a fixed composition. |
Element | all atoms in a substance have the same identity that substance is. |
Compound | substance in which the atoms of two or more elements are combined in a fixed composition. |
heterogeneous mixture | A mixture in which different materials can be distinguished easily. |
Homogeneous mixture | Solid,liquid,or gas that contains two or more substances blended evenly throughout. |
Solution | A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container. |
Colloid | a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out. |
Tyndall effect | Scattering of light by colloidal particles |
Suspension | a 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 | A change in size, shape, or state of matter |
Distillation | the process for separating substances in a mixture by evaporating a liquid and re condensing its vapor |
Chemical property | a characteristic of a substance that indicates whether it can undergo a certain chemical change. |
Chemical change | A change of substance to another |
Law of conservation of mass | the mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change. |