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36 Cards in this Set
- Front
- Back
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chemistry
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The study of the composition, structure, and properties of matter, as well as the changes it undergoes
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chemical
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Any substance that has a definite composition
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organic chemistry
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carbon containing compounds
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inorganic chemistry*
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non-carbon compounds
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physical chemistry
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relationship between matter and energy
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analytical chemistry
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composition of materials
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biochemistry
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occurring in living things
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theoretical chemistry
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uses math and computers to understand principles of chemical behavior; may also design new compounds
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basic research
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increases general knowledge
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applied research
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solves a problem
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technological development
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creates products that improve quality of life
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matter
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anything that has mass and takes up space
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mass
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-a measure of the amount of matter present
-measured on electronic balance |
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pure substance
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made of only one substance and have uniform composition (same characteristics and properties)
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mixtures
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blend of two or more kinds of matter (each retains its identity and property)
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element
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-PURE SUBSTANCE which cannot be broken down by ordinary chemical means
-made of atoms |
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atoms
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smallest unit of an element that maintains the properties of the element
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compound
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-PURE SUBSTANCE made of two or more types of elements bonded together
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homogeneous MIXTURE
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uniform composition (solutions)
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heterogeneous MIXTURE
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has visibly different parts (suspension)
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extensive property
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-depends on amount of matter present
-volume, mass, energy |
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intensive property
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-does NOT depend on amount of matter present
-boiling point, melting point, density, conducting heat/electricity |
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physical properties
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-can be observed or measured with out the changing the identity of substance
-boiling point, melting point |
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chemical property
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-substances ability to transform into a different substance
-carbon burns, iron rusts, silver tarnishes |
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physical change
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a change in substance that does NOT change its identity
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solid
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Definite volume and shape
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liquid
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Definite volume but shape changes
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gas
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No definite volume or shape
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plasma
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high temperature state in which atoms lose their electrons
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chemical change
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One or more substances are converted into different substances
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reactants
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substances that react
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products
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substances that are being made
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metals
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-Shiney solids, conduct heat and electricity, malleable, ductile
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semi-metals (mellatoids)
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Have some characteristics of metals and non metals
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non metals
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poor conductors of heat and electricity, can be gases, liquids, or brittle solids
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Noble gases
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inert or unreactive gases
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