Contents
                   Metallic Bonding
           Introducing metallic bonding
           Properties of metals
            Summary activities
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       Metals in the periodic table
      Metal are found at the left and centre of the periodic table.
   H                                                                He
   Li Be                                         B C N O F Ne
   NaMg                                          Al Si P S Cl Ar
   K Ca Sc Ti V Cr MnFe Co Ni Cu Zn GaGe As Se Br Kr
   Rb Sr Y Zr NbMo Tc RuRhPdAgCd In Sn Sb Te I Xe
   CsBa La Hf Ta W ReOs Ir Pt AuHg Tl Pb Bi Po At Rn
   Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg ? ? ? ? ? ? ?
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       Metallic bonding
      Atoms of metals are tightly packed together in a giant lattice 
      similar to the lattice in ionic compounds.
       metal 
       metal                                         Sea of free 
       atoms
       ions                                          electrons
      The outer electrons separate from their atoms and become 
      delocalized, creating a ‘sea of electrons’. The atoms 
      become positive ions and are attracted to these electrons.
      This attraction is called metallic bonding and is the reason 
      why the positive metal ions do not repel each other.
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       Electrons and metallic bonding
     How is the sea of electrons involved in metallic bonding?
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       Contents
                   Metallic Bonding
           Introducing metallic bonding
           Properties of metals
            Summary activities
 1 of 20
 6 of 17                                          ©©  BBooaarrddwwoorrkkss  LLttdd  22000045