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10 Cards in this Set
- Front
- Back
Matter
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anything that takes up space and has mass
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Chemistry
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a science that studies the composition and properties of matter, and the changes that matter undergoes.
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Atoms
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the smallest distinctive units in a sample of matter
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Molecules
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larger units in which two or more atoms are joined together
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Gas (Vapor)
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matter that has no fixed volume or shape (conforms to the container)- can be compressed to fit a much smaller volume- can expand to fill larger volume. The particles of a gas are FAR apart and moving at high speeds- colliding with each other- and walls of container
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Liquid
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matter that has a distinct volume independent of its container but has NO specific shape- will assume the shape of the container and cannot be compressed appreciably. particles are not as far apart as in gas phase- still move rapidly- allowing them to slide, glide, and rotate past and over each other- will "pour"
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Solid
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matter that is rigid and cannot be compressed to an appreciable extent- the atoms and molecules are held tightly together, usually in definite arrangements- in which the molecules can wiggle and vibrate only slightly in otherwise fixed positions.
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Kinetic Energy
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the energy associated with an object by virtue of its motion. An object of mass m and speed or velocity v has a kinetic energy Ek equal to: Ek= (1/2) mv^2
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Intramolecular Forces
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forces within a molecule- electrostatic attractions that produce chemical bonds between atoms (ionic and covalent)
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Intermolecular Forces
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electrostatic attractions between molecules
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