1 a Which type of compounds can be electrolysed? Why?
b What form must they be in?
2 What does electrolysis of these molten compounds give?
a sodium chloride, Naci b aluminium oxide, Alo,
c calcium fluoride, Caf d lead sulfide, PbS

Compare and contrast physical changes with chemical changes.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.