Please enable JavaScript.

Coggle requires JavaScript to display documents.

bonds, van der Waal, : - Coggle Diagram

- - - - when caused to break these molecular bonds they break suddenly
- - - - Physical properties
      - Poor electrical conductivity
        
        the atoms are neutral and held together by a rigid covalent bonds and the electrons are not free to move, so these materials are poor electrical conductors and are insulators.
        
        Hardness and strength
        
        covalent bonds are strong, in diamond each carbon makes 4 covalent bonds with neighboring atoms, to break diamond all these bonds must be broken diamond is hard and strong. it is also brittle however. Diamond is the one of the hardest materials.
        
        High melting/ boiling points
        
        Insolubility
        
        the atoms are neutral and so water is not attracted to the atoms and water molecules can not rip them away from the lattice. diamond is also insoluble in water.
    - - All the atoms bonded together in a giant molecule
      - Some elements including diamond (carbon), silicon - both have the 'diamond' structure
      - A single crystal od diamond or quartz is a single giant molecule.
  - - - instantaneous dipole - induced dipole attractions
        
        Simple molecular covalent-Elements,halogens,sulfer
        
        Monoatomic- Noble Gases (He,Ne,Ar,Xe,Kr)
      - permanent dipole - permanent dipole attractions
        
        Simple molecular covalent
        
        Compounds, ex- HCI(g)
      - hydrogen bonds