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Unformatted text preview: Ezzeldin Chemistry Assignment 2.1- a) O b) H c) N d) Ag e) S f) He g) C h) Na 2.2- a) Helium b) Palladium c) Tin d) Chlorine e) Oxygen f) Hydrogen g) Carbon h) Nitrogen i) Sulphur 2.3- a) Compound b) Mixture c) Mixture d) Compound e) Compound f) Compound g) Mixture h) Mixture i) Mixture 2.4- a) Element b) Compound c) Element d) Compound e) Compound f) Element 2.5- Element Consists of only one kind of atom Cannot be broken down into simple type of matter by either physical or chemical means. Compound Consists of atoms of two or more different elements bound together Can be broken down into a simpler type of matter by chemical means (not by physical means). 2.6- a) Liquid b) Solid c) Solid d) Gas e) Liquid f) Liquid g) Gas h) Gas i) Gas 2.7- 2.8- (a)Color --- Physical (b)Flammability --- Chemical (c)Behavior towards acid ---Chemical (d)Density --- Physical 2.9- (a)condensation of steam --- Physical (b)Burning of wood ---Chemical (c)Souring of milk --- Chemical (d)Melting of iron ---Physical (e)Bending of an aluminum rod ---Physical (f)Electrolysis of water --- Chemical 2.10- Silver Properties: The melting point of silver is 961.93C, boiling point is 2212C, specific gravity is 10.50 (20C), with a valence of 1 or 2. Pure silver has a brilliant white metallic luster. Silver is slightly harder than gold. It is very ductile and malleable, exceeded in these properties by gold slightly harder than gold....
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This note was uploaded on 03/14/2012 for the course ECONOMICS 101 taught by Professor Ivan during the Spring '07 term at Aarhus Universitet.
- Spring '07