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Properties of Matter Review & Changes Notes Wednesday, September 2 nd, 2015
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What is it?
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Pencil CH 3 COOH N 2 Aluminum (Al) Basketball Methane (CH 4 ) Ice Cream Zr
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Properties of Sodium (Na) Silvery Grey Color 30 grams Atomic Mass: 22.99 g/mol Melting Point: 97.5°C Can cut it with a knife When exposed to air and cut loses it’s grey color Has 3 isotopes Boiling Point: 883 °C Density: 0.97g/cm 3 Each flake is 4.21cm long Reacts quickly with water, snow, ice (highly explosive) Reacts with chlorine to form table salt
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Physical PropertiesChemical Properties Grey Color 30 grams Atomic Mass Melting Point Boiling Point Density 3 isotopes Cut with knife 4.21cm flakes Exposed to air, loses color Highly explosive in water Reacts with chlorine to form table salt
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Physical Change Physical properties (appearance) can change while the composition remains the same. A change in size, shape, or state of matter in which the identity remains the same is called a physical change.
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Chemical change A change of one substance into another is a chemical change. Burning a log Formation of rust on a nail Rotting eggs Putting alka-seltzer in a glass of water ****Look for clues such as heat formation, the formation of bubbles/solids in a liquid, smell, or color change
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Base on the previous notes classify the following as a physical property, physical change, chemical property, chemical change: a) Evaporation of water b) Tearing paper c) Burning paper d) The fact that water is a liquid e) The fact that wood can burn
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Base on the previous notes classify the following as a physical property, physical change, chemical property, chemical change: a) Evaporation of water - physical change b) Tearing paper - physical change c) Burning paper - chemical change d) The fact that water is a liquid - physical property (intensive) e) The fact that wood can burn - chemical property *** Check online tonight for more review/practice identifying properties & changes ***
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