Common Metals

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Common Metals (?????)
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Integrated Chemistry Today

• Book 1A, 2nd Edition8.1 Some common articles
  made from metals(pg 121-122)

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Discussion (pg 121)

• 1 a) Which metal is used for making each of the
  articles shown in Fig 8.1?

Tungsten (W)
Aluminium (Al)
Iron (Fe)
Iron (Fe) Tin (Sn)
Duralumin (Al Mg)
Copper (Cu)
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Integrated Chemistry Today

• Book 1A, 2nd Edition8.2 General properties of
  metals(pg 122-123)

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Uses of Common Metals
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General Properties of Metal(???????)

• Shiny, with lustre (???)
• Silvery White in colour (except Au Cu)
• Hard and Strong
• Malleable (??) can be hammered into a sheet
  form without breaking.
• Ductile (??) can be drawn into a wire without
  breaking.
• Good conductor of heat and electricity.
• Can be cast (??) into different shapes easily.

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? State the uses of the metals and the related
properties.
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? State the uses of the metals and the related
properties.
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? State the uses of the metals and the related
properties.
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Uses related to characteristics (??) of different
metals
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? State the factors affecting the choice of metal
for a particular use.
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? State the factors affecting the choice of metal
for a particular use.

• Appearance (??), Strength (??), Electrical
  conductivity (???), Thermal conductivity (???),
  Malleability (???), Ductility (???)Resistance to
  corrosion (??), Resistance to abrasion (??)

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Integrated Chemistry Today

• Book 1A, 2nd Edition8.3 Prices of metals(pg
  122-123)

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Another important factor affecting the choice of
metal
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Another important factor affecting the choice of
metal

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Factors affecting the
Supply (??)
Demand (??)
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Factors affecting the
Supply (??)
Demand (??)

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Factors affecting the

• Supply (??)
• Abundance (??) / Cost of extraction (??) mining
  (??)
• Demand (??)
• Properties (??) / Uses (??)

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Classwork (pg 124)
1083 ºC
gold
copper, gold, iron
aluminium
a large amount of energy required to extract
aluminium
the abundance of iron is higher than that of
copper, furthermore copper has more desirable
properties than iron.
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Integrated Chemistry Today

• Book 1A, 2nd Edition8.4 Choosing the right metal
  for a particular use(pg 124-126)

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Discussion (pg 126)

• 1. Suppose you are asked to choose a metal for
  making overhead power transmission cables.
• a) List the characteristic the chosen metal
  should have.
• b) Which metal would you choose ? Explain your
  choice.

high electrical conductivity
ductile
light
high tensile strength
cheap if possible
resistant to corrosion
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Discussion (pg 126)
B
C
A
D
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Disscussion (pg 126)
weight of 1m3 x cost of 1 tonne density x cost
of 1 tonne
tin plated steel
low strength - deform easily in making and
transportation low melting - cannot withstand the
heat in food processing (tin is toxic)
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Discussion (pg 126)
Lower transportation cost.
Cheaper material cost.
Strong enough to resist damage during manufacture
and transportation.
Easy to seal after filling.
Attractive.
Easy to open.
Resistant to corrosion.
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Q 1 (pg 130)
expensive, attractive
light, strong
high melting
high conductivity
high conductivity, ductile
cheap, strong
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Q 2 (pg 130)

• List the general properties of metals

Shiny
Malleable
Ductile
High electrical and thermal conductivity
Usually high melting and boiling
Usually dense
Usually hard and strong
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Q 6-9 (pg 130)
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Q 10 (pg 130)