C3h Metal Structure & Properties Question Foundation

C3h Metal Structure & Properties Question Foundation

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  • Created on: 03-05-12 07:26
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Item C3h: Metal Structure and Properties
1. Iron is used to make steel and to make cars and bridges because it is strong.
2. Copper is used to make b................ . ( this is an alloy alloy is a m................ of
atleast two metals )
3. Copper is used to make ................ wiring because it is a good e................
c................ .
4. Copper is also a very good conductor of ................ , so it is used to make
b................ of saucepans.
5. Generally these are the physical properties of metals: ( remember some metals do not show
all these properties)
L................ (shiny), h................ and ................ density
high t................ strength
high m................ in and b................ points
good ................ of heat and electricity
6. Use the following table giving some information about metals, to answer the
questions:
Metal Melting Electrical Density Hardness Tensile Cost
point ° C. conductivit (g/cm3) strength
y
Aluminium 661 Good 2.70 Medium Medium Low
Copper 1083 Very good 8.92 Medium Medium Medium
Gold 1065 Very good 19.29 Soft Low Very high
Lead 328 Good 11.34 Soft Low Low
Iron ( steel) 1535 Good 7.87 Hard Very high Low
Tungsten 3407 Good 19.40 Hard high High
a) in an electric bulb in metal coil is heated until it glows white hot. The
metal is heated temperatures around 2000° C. Which of the above
metals do you think is chosen for this purpose. Give The reason for your
choice..........................................................................
.........................................................................................
b) Copper is a better connector project city than aluminium, but aluminium
is used for overhead power cables that go from one electricity pylon to
another. Suggest why aluminium is used: ...........
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Iron is used to build bridges. Suggest a reason for this: ..................
............................................................................................
7. Describing metallic bonding: metal particles are held together by a very strong m................
bonds. Because of these strong bonding the metal particles are held together so strongly and
this is why most metals have high t................ strength, which means they do not break easily
when pulled. Most metals have high in ................ point and ................ point for the same
reason.
8. Metals are made up of c................ .…read more

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