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28 Cards in this Set
- Front
- Back
Descriptive Chemistry
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The discovery and tabulation of chemical facts
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Theoretical Chemistry
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The formulation of theories that, upon verification, unify these facts and combine them into a system
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Matter
Radiant Energy |
The universe is composed of _____ and _____.
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Matter
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Consists of all of the materials around us -gases, liquids, solids.
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Mass
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The quantity that measures an object's resistance to change in its state of rest or motion
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Weight
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A measure of the force with which an object is attracted by the earth
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Chemical Balance
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States that the mass of an object remains the same at the North Pole as at the equator, and it can easily be determined, at any place on the earth's surface, by comparison with a standard set of masses.
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Kilogram (kg)
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The SI unit for mass
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Material
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Refers to any kind of matter, whether homogeneous or heterogeneous
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Homogeneous
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Material with the same properties
throughout |
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Heterogeneous
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Material that consists of parts with different properties
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Phase
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A homogeneous part of a system, separated from other parts by physical boundaries (i.e. ice = solid, water = liquid, air = gaseous).
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Substance
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A homogeneous material with definite chemical composition
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Solution
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A homogeneous material that does not have a definite composition
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Compound
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A substance that can be decomposed into two or more substances
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Elementary Substance
(Element) |
A substance that cannot be decomposed
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Analysis
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The process of decomposing a compound into two or more simpler substances
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Synthesis
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Forming a substance by combining two or more substances
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Properties
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The _____ of substances are their characteristic qualities.
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Physical Properties
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Those properties of a substance that can be observed without changing the substance into other substances
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Melting Point
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The temperature at which a solid substance melts to form a liquid.
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Malleability
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The ease with which a substance can be hammered out into thin sheets
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Ductility
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The ease with which the substance can be drawn into a wire
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Density
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The mass (weight) of a unit volume (1 cubic centimeter) of the substance
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Chemical Properties
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Those properties that relate to its participation in chemical reactions
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Chemical Reactions
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The processes that convert substances into other substances
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Chemistry
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The science of substances; their structure, their properties, and the reactions that change them into other substances.
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Element
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A kind of matter consisting of atoms that all have nuclei with the same electric charge
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