electronegativity

• define electronegativity

  the ability of an atom to attract the bonding electrons in a covalent bond towards itself
• define polarity

  unequal sharing of electrons in a bond
• define non-polar

  electron sharing in a bond is equal
• cation

  small/ high charge. it is polarising so is attracting
• anion

  large/ high charge. it is polarised so is attracted
• best type of attraction is between a small high charged cation and a large anion