B.compound Because compound is when two element are combined or joined chemically
Answer:
Reactants starts the chemical reaction and gives right to the product either by thermal decomposition or in the presence of a catalyst.
Explanation:
Reactants and products contain the same atoms, but they are rearranged during the reaction, so reactants and products are different substances.
The answer you are looking for would be Colloid, because in colloid mixtures, the particles are big enough to reflect them in a way. Colloids can be distinguished from solutions using the Tyndall effect. Light passing through a colloidal dispersion, such as smoke or foggy air, will be reflected by the larger particles and the light beam will be visible. <span />
Mass/volume cause you divide to get density
