Periodic trends in BP and structure

Cards (10)

  • What are some properties of metals?
    Strong, high BP and MP usually, conduct heat and electricity
  • What is metallic bonding?
    It is the attraction between the positive metal ions and the negative sea of electrons
  • Why can metallic compounds conduct electricity?

    The electrons are mobile charge carriers meaning they can move throughout a compound and conduct electricity
  • Are metals soluble?
    No
  • Why do metals have such a high MP and BP?
    Lots of energy is required to overcome the strong electrostatic attraction between the cations and electrons, this can result in high bp and mp
  • What is a giant covalent structure?
    it is a large structure of molecules which are covalently bonded together
  • What are some examples of giant covalent structures?
    Diamond, graphite, and silicon dioxide
  • What are some properties of covalent lattices?
    High melting and boiling points, due to the strong covalent bonds, they are insoluble in water
  • can giant covalent structures conduct electricity?
    no, the only exceptions are graphene and graphite which are forms of carbon, this is because graphene has layers which have mobile electrons/ delocalised electrons allowing for the conduction of electricity
  • What are the trends in melting point across period 2 and 3?
    They increase up until the elements form simple molecules rather than giant structures