When a compound has a Roman Numeral in it, that tells you the 2 points
the positive oxidation number
the subscript of the element before it
the subscript of the element after it
the negative oxidation number
K
the year

70x30

Explanation:

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.