properties of ionic compounds

• atoms that have lost electrons have more protons than electrons
• what charge do atoms that have more protons than electron

  positive: positive ion
• atoms that lose more protons have more electrons than protons
• what charge do atoms that have more electrons than protons

  negative ion
• what do ionic compounds form

  crystals with a cubic shape
• why do ionic compounds form crystals with a cubic shape

  because of the giant structure of the ionic lattice
• solid sodium chloride doesnt conduct electricity
• water doesnt conduct electricity
• what solution conducts electricity

  sodium chloride + water (H20) dissolved solution
• what also conducts electricity (in terms of sodium chloride)

  molten sodium chloride
• why does sodium chloride + water conduct electricity

  • because the water dissolves the salt, freeing up the positively charged sodium ions and negatively charged chloride ions
  • these free-moving ions act as charge carriers, moving towards the oppositely charged electrodes in an electric current, allowing the solution to conduct electricity. 
• what is the melting point of an ionic compound

  very strong

  need heat to break

  when enough energy is supplied to separate the ions from the lattice they become mobile and move around; ionic solid melts to liquid and ions free to move
• ions are solid and vibrate in a fixed position
• why do ions vibrate in a fixed position

  because of the strong bond they cant move
• when can ions move

  when they melt they are free to move in molten compound but when they dissolve in water, ions are free to move in solution