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-rigid shape, fixed volume
-external shape can reflect particles arrangement
-behavious is reasonably well understood |
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expand to fill container
behaviour is well understood (&simple) |
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-fluid shape but fixed volume
-behaviour is not well understood (complicated) |
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Pure substances taht can't be subdivided into any other substances (composed of only one kind of atom) |
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Pure substances that require chemical means to be further subdivided
-can't separate into parent elements via physical separation methods
-building blocks composed of 2 or more elements |
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Molecule=atoms bonded together into discrete unit |
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Ion=electrically charged atoms or groups of atoms |
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Energy associated with position |
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Potential Energy -- an object held at a height ie. waterfalls |
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Potential Energy -- Energy stored in molecular bonds |
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Potential energy -- energy due to attractions between
charged or partially charged particles |
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Potential Energy -- energy associated with attractions between
nuclear particles (released via fission, fusion) |
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Kinetic Energy -- movement of a macroscopic object |
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Kinetic Energy -- Motion at the particulate level |
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Kinetic Energy -- movement of electrons in a conductor |
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Kinetic Energy -- compression-type wave motion |
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Fast motion at the particulate level creates... |
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The coldest state of matter is |
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solids because of low kinetic energy |
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What causes a phase change? |
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Colour, Odor, state of matter, appearance, melting/boiling point, solubility, electrical conductivity, malleability, ductility, viscosity, and density are all examples of... |
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-non-uniform in appearance
-always a mixture of substances |
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-uniform in appearance
-could be a mixture |
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-Uniform mixture of substances
-Widely variable composition
--Homogeneous mixtures |
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-fixed composition
-Cannot be further purified
--Homogeneous mixture |
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Name a way to separate a heterogeneous mixture |
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Name one way to separate a homogeneous mixture |
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Distillation
Chromatography |
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-physical method of separating a homogeneous mixture
-used to test purity
-uses filter paper and ink |
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a change in the organization of atoms/molecules/ions |
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A change in the composition of atoms/molecules/ions
-changed substance |
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Name examples of physical change |
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-melting butter
-dissolving sugar
-boiling water |
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Give examples of chemical changes |
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burning butter
digesting sugar
reacting water with Na(s) |
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quantitative observations |
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Characteristics of the substance itself, not the quantity
-Density
• Melting point
• Boiling point
• Viscosity etc… |
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Properties that depend on the quantity of substance present
Mass
• Volume
• Length, width, height… |
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how do you convert celsius to kelvin? |
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0 degrees kelvin
no motion at the particulate level |
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Give the equation for density |
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