Giant Metallic structure

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Giant Metallic structure(??????)

• Sea of electron model of metal

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Integrated Chemistry Today

• Book 1A, 2nd Edition8.5 The structures of
  metals(pg 127)8.6 Explaining the general
  properties of metals(pg 127-128)

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Giant metallic structure (??????) of metal
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General properties of metal

• Shiny
• Malleable and Ductile
• High electrical and thermal conductivity
• Usually high melting and boiling
• Usually dense
• Usually strong and hard

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Sea of electrons model of metal
sea of delocalized electrons from the metal atoms
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Electrostatic (??) nature of metallic bond

electrostatic attraction
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electrostatic attraction

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(No Transcript)
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General properties of metal

• Shiny
• Malleable and Ductile
• High electrical and thermal conductivity
• Usually high melting and boiling
• Usually dense
• Usually strong and hard

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Q 3 (pg 130)

• Describe the bonding present in metals.

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? Describe the structure of a metal.

• In the metallic structure, each metal atom
  donates its outermost shell electrons to the
  surrounding to form a sea of delocalized
  electrons.
• The positive ions formed from the atoms are then
  arranged regularly to form a giant lattice
  structure immersing (?) in the sea of delocalized
  electrons.

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Relationship between the properties and the
structure of metal
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Electrical conductivity (???) of metal
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Thermal conductivity (???) of metal
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Q 4 (pg 130)

• Explain why metals are good conductors of
  electricity.

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? Explain the electrical and thermal
conductivities of metal in term of its structure.

• All metals are good conductors of electricity and
  heat because of the presence of delocalized
  electrons.
• When an electric power is connected to a piece of
  metal, the delocalized electrons move to conduct
  electricity.
• When a piece of metal is heated, the delocalized
  electrons vibrate (??) rapidly to conduct heat.

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Malleability (???) and Ductility (???) of metal
atoms moved to new positions
metallic bond formed at new positions
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Q 5 (pg 130)

• Explain why metals are ductile and malleable.

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? Explain the malleability and ductility of metal
in term of its structure.

• Metal is malleable and ductile because metallic
  bond is non-directional and the delocalized
  electrons are free to move.
• When a piece of metal is hammered or pulled
  strongly, the atoms will slide over each other
  and new metallic bond will be formed at the new
  positions to keep the metal in a piece.