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Notes for chapter 1

Notes for chapter 1 - Term Definition Qualitative...

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Unformatted text preview: Term: Definition: Qualitative observation A qualitative observation id one that can be made without measurement. Term: Definition: Quantitative observation A quantitative observation is one that uses measurement. Term: Definition: Substance Substance is matter with the same fixed composition and properties. Term: Definition: Mixture A mixture is a combination of two or more substances in which the basic identity of each substance is not changed Term: Definition: Physical change A physical change is a change in matter that does not involve change in the identity of the substance. Term: Definition: Chemistry Chemistry is the science that investigates and explains the structure and properties of matter. Term: Definition: Matter Matter is anything that takes up space and has mass. Term: Definition: Mass Mass is the measure of the amount of matter that an object contains. Term: Definition: Properties Properties of matter describe the characteristics and behavior of matter, including the changes that matter undergoes. Term: Definition: A scientific model A scientific model is a thinking device that helps you understand and explain macroscopic observations. Term: Definition: Heterogeneous mixture Heterogeneous mixture is one that does not have a uniform composition and in which the individual substances remain distinct. Term: Definition: Homogeneous Homogeneous mixtures are the same throughout. Another name for a homogeneous mixture is solution. Term: Definition: Alloys Alloys are solid solutions that contain different metals and sometimes-nonmetallic substances Term: Definition: Solute Solute is the substance being dissolved. Term: Definition: Solvent Solvent is the substance that dissolves the solute. Term: Definition: Aqueous solution When the solvent is water, the solution is called an Aqueous solution. Term: Definition: Elements Elements are the simplest form of matter. Term: Definition: Compound Compound is a chemical combination of two or more different elements joined together in a fixed proportion. Term: Definition: The periodic table of elements The periodic table of elements organizes elements. Term: Definition: Chemical symbols Chemical symbols are an universal shorthand for chemical name. Term: Definition: Physical properties Physical properties are characteristics of a sample of matter that can be observed or measured without any change in its identity. Term: Definition: The Scanning Tunneling Microscope (STM) The Scanning Tunneling Microscope (STM) provides a visible perspective of the submicroscopic world; it can even be used to move individual atoms around on a surface. Term: Definition: Microscopic Matter that is large enough to be seen is called microscopic Term: Definition: The submicroscopic view The submicroscopic view gives you a glimpse into the world of atoms. ...
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