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Chemistry Chapter 1

Chemistry Chapter 1 - Term Definition Chemistry the science...

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Unformatted text preview: Term: Definition: Chemistry the science that investigates and explains the structure and properties of matter. Term: Definition: Matter anything that takes up space and has mass. Term: Definition: Properties (of matter) the characteristics and bevaior (of matter) Term: Definition: Macroscopic level of matter matter that is large enough to be seen, something that you can touch, feel, smell, and see. Term: Definition: Submicroscopic level of matter matter that is so small and cannot be seen with the most powerful light microscope. Term: Definition: Scientific Model a thinking device that helps in understanding and explaining macroscopic observations. Term: Definition: Qualitative observation one that can be made without the use of measurement. Term: Definition: Quantitative observation one that uses measurement. Term: Definition: Substance matter with the same fixed composition and properties. Term: Definition: Mixture combination of two or more substances in which the basic identity of each substance is not changed. Term: Definition: Physical change a change in matter that does not involve a change in the identity of the substance. Term: Definition: Physical properties characteristics of a sample of matter that can be observed or measured without any change in its identity. Term: Definition: Heterogenous mixture mixture that does not have a uniform composition and in which the individual substances remain distinct. Term: Definition: Homogenous mixture mixture that is the same all throughout (also called solution). Term: Definition: Alloys solid solutions that contain different metals and sometimes nonmetallic substances. Term: Definition: Solute the substance being dissolved. Term: Definition: Solvent the substance that dissolves the solvent. Term: Definition: Aqueous solution a solution wherein the solvent is water. Term: Definition: Elements the simplest form of matter. Term: Definition: Compound a chemical combination of two or more different elements joined together in a fixed proportion. Term: Definition: Chemical Formula a combination of the chemical symbols that show what elements make up a compound and the number of atoms of each element. Term: Definition: Physical change The change in matter that does not involve the identity of the substance. Term: Definition: Volatile when a substance changes to gas easily at room temperature. Term: Definition: Density the amount of matter (mass) contained in a unit of volume Term: Definition: Chemical Properties properties that can be observed though only when there is a change in the composition of substance. Term: Definition: Energy capacity to do work. Term: Definition: Exothermic reactions chemical reactions that give off heat energy. Term: Definition: Endothermic reactions chemical reactions that absorb heat energy. Term: Definition: Chemical change the change of one or more substances into other substances. Term: Definition: Law of conversation of mass says that in a chemical change, matter is neither created nor destroyed. ...
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