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30 Cards in this Set
- Front
- Back
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physical state
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the condition of matter existing as a solid liquid or gas
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sublimation
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a direct change of state from a solid to a gas
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deposition
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a direct change of state from a gas to a solid
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heterogeneous mixture
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matter having an indefinite composition and variable properties
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kinetic energy
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matter having a definite compostion, but variable properties from sample to sample; for example, alloys and solutions
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substance
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matter having a definite compostion and constant properties; for example, an element or compound
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alloy
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a homogenous mixture of two or more metals
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compound
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a substance that can be broken down into simpler substances
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element
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a substance that cannot be broken down by chemical reaction
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atom
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the smallest particle that represents an element
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chemical symbol
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an abbreviation for the name of an element
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metal
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a high density element that is a good conducture of heat and electricity
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malleable
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the property of a metal that allows it to be machined into a foil
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ductile
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the property of a metal that allows it to be drawn into a wire
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nonmetal
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an element that has a low melting point and is not a good conductor
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semimetal
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an element that has properyies midway between those of a metal and a nonmetal
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atomic number
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a number that identifies a particular element
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periodic table
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a chart that arranges elements according to their properties
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law of definite compostion
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the principle that a compound always contains the same mass ratio of elements
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molecule
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a single particle composed of two or more nonmetal atoms
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chemical formula
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an abbrieviationfor the name of a compound
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physical property
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a property that can be observed without changing the formula of a substance
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chemical property
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a property that cannot bee observed without changing the formula of a substance
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chemical change
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a modification of a substance that alters the chemical compostion
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physical change
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a modification of a substance that does not alter the chemical compostion
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the stored energy that matter possess owing to its position or compostion
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potential energy
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the energy associated with the mass and velocity of a particle
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kinetic energy
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the law that states mass cannot be created or destroyed
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law of conservation of mass
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the law that states energy cannot be created or destroyeed
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law of conservation of energy
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the law that states the total mass and energy is constant
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law of conservation of mass and energy
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