Lets classify each of the given materials as an element, compound, heterogeneous mixture or homogeneous mixture.
• An element can be said to be any material that is made up of one atom.
• A compound is a material formed from a combination of two or more elements.
• A heterogeneous mixture can be said to be any mixture in which the composition is not uniform.
• A homogeneous mixture is any mixture which has equal proportions of components.
Therefore, we have the following:
• (a). ,phosphor bronze: This is a homogeneous mixture.
• (b). salt dissolved in water: This is a homogeneous mixture of sodium chloride and water.
• (c). Pizza: Pizza can be said to be a heterogeneous mixture.
• (d). Zinc Sulfide: Zinc sulfide is a combination of sulfur and zinc. Hence, it is a compound.
ANSWERl
(a). Homogeneous mixture
(b). Homogeneous mixture
(c). Heterogeneous mixture
(d). Compound.