Metallic bonding topi c 4 4
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Metallic bonding Topi c 4.4. YouTube video 1:21. valence electrons detach from individual atoms since metals contain only 1-3 valence electrons no particular electron is confined to a particular metal atom

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Metallic bonding Topi c 4.4

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Metallic bonding topi c 4 4

Metallic bonding Topi c 4.4

YouTube video 1:21


Metallic bonding topi c 4 4

  • valence electrons detach from individual atoms since metals contain only 1-3 valence electrons

    • no particular electron is confined to a particular metal atom

    • leaves a close packed lattice of positive ions (cations) in a sea of delocalized negative electrons

  • the electrostatic attraction between the cations and sea of electrons holds the metal together

    • electrons act as a "glue" giving the substance a definite structure


Metallic bonding topi c 4 4

  • when the metallic atom becomes bigger, the sea of negative electrons becomes farther away and harder for nuclei to hold on to

    • therefore, melting point decreases as you go down period one the table (or any metal for that mater)


Metallic bonding topi c 4 4

  • the delocalized nature of the bonds, make it possible for the atoms to slide past each other

    • this means metals are malleable and ductile

      • hammered into thin sheets or shapes without breaking

      • drawn into wires

    • ionic compounds would crack

  • metals are essential part of the world economy

    • reinforcement of concrete, wires, cars, pipes…

    • traded as commodities

    • most common is iron which is in steel


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