bonding

• how are LDFs formed?

  LDFs can operate between all atoms and molecules. They are formed by the electrostatic attraction between temporary dipoles and induced dipoles which are caused by the movement of electrons in atoms and molecules.
• Dipole Dipole interaction

  the attraction between oppositely charged ends of polar molecules
• hydrogen bond

  consists of hydrogen bonded to nitrogen, oxygen and fluorene - a special type of dipole is formed.
• The stronger the intermolecular force of attraction...

  the higher the melting and boiling point and increasing viscosity.
• like dissolves like - polar dissolves polalr
• pure / non polar covalent - 0-0.39 electronegativity difference

  polar covalent - 0.4 - 2 electronegativity difference

  iconic - 2.1 + electronegativity difference