metallic bonding

• What holds metal atoms together in metallic bonding?

  Metallic bonding
• What happens to metal atoms during metallic bonding?

  They lose valence electrons and become cations

  
• What occurs to the outermost valence electrons in metallic bonding?

  They become delocalised
• How do delocalised electrons behave in metallic bonding?

  They move freely between positive metal ions

  
• What is the arrangement of positive metal ions in metallic bonding?

  They are in a closely-packed, regular arrangement

  
• What are the properties of metals explained by metallic bonding?

  • High melting and boiling points
  • Conduct electricity
  • Malleable and ductile
  • High thermal conductivity

  
• Why do metals have high melting and boiling points?

  Many strong metallic bonds require heat to break

  
• How do metals conduct electricity?

  Free electrons move and carry charge

  
• What happens when electrons enter one end of a metal?

  A delocalised electron displaces from the other end

  
• Why are metals malleable and ductile?

  Layers of positive ions can slide over each other

  
• What happens to metallic bonding when metals are shaped?

  Bonding is not disrupted due to delocalised electrons

  
• What is thermal conductivity in metals?

  Ability to conduct or transfer heat

  
• What occurs when one end of a metallic substance is heated?

  Kinetic energy of electrons increases
• How do electrons transfer kinetic energy in metals?

  Through collisions with other electrons
• How does the mobility of electrons affect thermal conductivity?

  Greater mobility leads to quicker energy transfer
• How do delocalised electrons contribute to heat transfer in metals?

  They collide with other electrons to transfer heat