As you can see the solid salt when poured to the liquid also known as the solvent , when the salt is poured on the liquid solvent , they mix and as you can see here is how they look when they are mixed. Solute particles cannot be seen after they are dissolved fully in the solvent

Solution

• We most often think of a solution as being made of a solid dissolved in a liquid. Two-thirds of the Earth’s surface is covered by a solution of various salts in water.

• The salts are totally dispersed in the water and cannot be seen. However, other substances that are not normally solid are dissolved in seawater. For example, the dissolved gases, oxygen and carbon dioxide, are important for life to exist in the oceans.

Solubility

• Water is the commonest solvent in use, but other liquids are also important.

  
  

• Most of these other solvents are organic liquids, such as ethanol, propanone and trichloroethane. These organic solvents are important because they will often dissolve substances that do not dissolve in water.

• If a substance dissolves in a solvent, it is said to be soluble; if it does not dissolve, it is insoluble.

• Less obvious, but quite common, are solutions of one liquid in another. Alcohol mixes (dissolves) completely with water. Alcohol and water are completely ( miscible -- mixture of 2 liquid ): this means that they make a solution.

Alloy

• Alloys are a mixture of elements

• Alloys are similar mixtures of metals, though we do not usually call them solutions. They are made by mixing the liquid metals together (dissolving one metal in the other) before solidifying the alloy.