metallic bonding

What is a metallic bond

Electrostatic attraction between positive metal ions and delocalised valence electrons

Properties of a metallic bond

• lustrous

• Sonorous

• Malleability

• Electrical conductivity

• Thermal conductivity

What factors are depended on the strength of metallic bond

• radius of metal ions

• Ionic charge

what makes a stronger metallic bond

small atomic radius, high ionic charge

why does the radius determines the metallic bond?

small radius = stronger metallic bond

bc of shorter distance between positive nucleus of the cation & the surrounding delocalized electrons

why does the ionic charge determine the strength of the metallic bond?

high ionic charge = stronger metallic bond

bc greater charge = greater # of delocalized valence electrons

greater charge results in stronger electrostatic attraction & stronger metallic bond

A higher ionic charge means there’s more positive pull on the delocalized electrons, so the metal ions and electrons attract each other more strongly

melting point decreases as you go….

down a group of elemental solids

bc of decreased strength as radius for metal ions increases

melting point increased as you go…

across a period of elemental metals because of increase of metallic bond, increase in electron density, charge of metal ions becomes larger