metallic structures

• what is a metallic structure?

  lattice of positive ions in 'sea' of delocalised electrons held together by strong metallic bonds
• what is a metallic bonds?

  strong electrostatic force of attraction between positive metal ions and delocalised electrons
• what elements do metallic bonds form between?

  metal + metal
• what is the drawing of metallic structures?

  1. 9 atoms (circles) all close together and touching
  2. positive charge of atoms
  3. floating delocalised electrons surrounding
• why do metallic structures have a high melting point?

  1. X has giant metallic structure
  2. strong attraction between positive ions and delocalised electrons
  3. high amounts of energy required to break bonds
• does Na or K have a higher melting point?

  1. Na
  2. has smaller ionic radius
  3. less shielding
  4. greater attraction between positive ions and delocalised electrons
  5. more energy required to break bonds
• does Na or Mg have a higher melting point?

  1. Mg
  2. greater ionic charge
  3. more delocalised electrons
  4. more energy required to break bonds
• why do metallic structures conduct electricity?

  1. X has giant metallic structure
  2. delocalised electrons that are free to move and carry charge
• why are metallic structures malleable and ductile?

  1. X has giant metallic structure
  2. with layers of ions that can slide over each other
  3. retains strength of metallic bonds
• why are metallic structures insoluble?

  1. X has giant metallic structure
  2. solvents can't break down strong metallic structure