Classify each of these as an element, compound, or mixture: 3a. copper 3b. water 3c. nitrogen (see link attached to this post) 3d. sulfur 3e. air 3f. sucrose (table sugar) 3g. gasoline

Copper = Element

Water = Compound

Nitrogen = Element

Sulfur = Element

Air = Mixture

Sucrose = Mixture

Gasoline = Mixture

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.

the answer to this question is 3.