Metallic Bonding

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Metallic Bonding

• Chemistry I
• Fall 2004

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Metals

• Atoms have less than 4 valence electrons.
• Atoms have low electronegativity
• Atoms have low ionization energy
• Valence electrons are very loosely held
• Therefore, metal atoms give up electrons very
  easily.

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Metals

• Atoms have less than 4 valence electrons.
• Atoms have low electronegativity
• Atoms have low ionization energy
• Valence electrons are very loosely held
• Therefore, metal atoms give up electrons very
  easily.

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Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
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Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
6
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
7
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
8
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
9
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
10
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
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Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
12
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
13
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
14
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
15
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
16
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
17
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
18
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
19
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
20
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
21
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
22
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
23
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
24
Metal Metal Bonds
Two metal atoms with loosely held valence
electrons.
25
Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
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Metal Metal Bonds

Two metal atoms with loosely held valence
electrons.
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Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
28
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
29
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
30
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
31
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
32
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
33
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
34
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
35
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
36
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
37
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
38
Metal Metal Bonds
As the two atoms get closer to one another those
loosely held valence electrons can become
delocalized and orbit the other nucleus.
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Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

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Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

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Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

42
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

43
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

44
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

45
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

46
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

47
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

48
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

49
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

50
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

51
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

52
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

53
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

54
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

55
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

56
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

57
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

58
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

59
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

60
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

61
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

62
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

63
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

64
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

65
Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

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Metallic Bonds

• Described as metallic nuclei floating in a sea of
  delocalized electrons.

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Metallic Bonds

• When two or more metals are bonded together an
  alloy is formed.
• An Alloy has properties that are a composite of
  the constituent metals.
• Metals are blended to produce specific properties.

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Common Alloys

• Brass 67 copper, 33 zinc
• Stainless Steel 81 iron, 18 chromium, 1
  nickel
• Sterling Silver 92.5 silver, 7.5 copper
• Gold, 18K 58 gold, 28 copper, 14 silver
• Pewter 91 tin, 3 copper, 3 antimony, 3 lead
  

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Uses of Alloys

• Could you use a baseball bat made of 100
  aluminum?
• NO!
• It would bend when it hit the ball.

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Uses of Alloys

• Baseball bats are made of an alloy containing
• Aluminum
• and
• Titanium
• or
• Scandium

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Uses of Alloys

• Could you eat off of a fork made of 100
  aluminum?
• NO!!
• The tines would bend.

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Uses of Alloys

• Could you wash a fork made of 100 steel?
• NO!!
• It would rust.

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Uses of Alloys

• Dinnerware is made of an alloy known as stainless
  steel. It contains
• iron
• chromium
• nickel