properties of matter review & changes notes wednesday, september 2 nd, 2015
TRANSCRIPT
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Properties of
Matter Review & Changes Notes
Wednesday, September 2nd, 2015
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What is it?
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What is it?
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What is it?
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What is it?
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What is it?
Pencil CH3COOH N2
Aluminum (Al) Basketball
Methane (CH4) 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/cm3
• 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 Properties Chemical 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 waterb) Tearing paperc) Burning paperd) 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***