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29 Cards in this Set
- Front
- Back
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The study of the compostion, structure, properties of matter and the energy changes that accompany these processes.
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chemistry
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any substance that has a definite composition
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chemical
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measurement of the amount of matter
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mass
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anything that has mass and takes up space
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matter
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the smallest unit of an element that maintains the chemical identity
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atom
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a pure substance that cannot be broken down into simpler, stable substances and is made of one type atom
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element
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a substance that can be broken down into stable substances
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compound
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depend on the amount of matter that is present (volume, mass, amount of energy)
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extensive properties
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do not depend on the amount of matter present (melting point, boilinb point, density, ability to conduct electricity and energy as heat)
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intensive properties
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can be observed or measured without changing the identity of the substance
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physical property
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a change that does not change the identity of the substance
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physical change
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a physical change of a substance from one state to another (s, l, g)
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change of state
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has definite volume and shape
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solid
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definite volume but indefinite shape
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liquid
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neither definite volume nor shape
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gas
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high temperature physical state of matter in which atoms lose most of their electrons.
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plasma
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the ability to undergo changes that transform it into different substances
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chemical property
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one or more substances are converted into different substances
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chemical change
chemical reaction |
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substances that react in a chemical change
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reactants
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substances that are formed by a chemical change
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products
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a blend of two or more kinds of matter which retains its own identity and properties
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mixture
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a mixture that is uniform in composition
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homogeneous
also called solutions |
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a mixture that is NOT uniform throughout
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heterogeneous
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has a fixed composition
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pure substance
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vertical columns of the periodic table
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groups or families
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horizontal rows of elements in the periodic table
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periods
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an element that is a good
- heat conductor - electrical conductor - malleable - have luster |
metal
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an element that is a POOR conductor of
- heat/ - electricity - dull in appearance - brittle |
nonmetal
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found between metals/nonmetals. Have characteristics of both
- solid at room temp - semiconductors |
metalloids
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