Final answer:
Mineral X, which dissolves completely in water, likely has ionic bonds, as these types of bonds are soluble due to the formation of ion-dipole attractions with water molecules.
Step-by-step explanation:
When considering the solubility of minerals in water and the types of bonds they possess, Mineral X likely has ionic bonds. This deduction is made based on the fact that ionic compounds tend to be soluble in water due to the ion-dipole attractions that form between the ions in the compound and the water molecules. Solvation forces can overcome the electrostatic forces holding the ions together, leading to dissolution. In contrast, minerals with metallic bonds or covalent network structures, like Mineral R which does not dissolve, have stronger bonds that are not as easily broken by solvation forces. Therefore, the solubility behavior observed suggests that Mineral X has ionic bonds, Mineral Q, which dissolves a little, could have a combination of ionic and covalent bonding or be a polar covalent compound, and Mineral R could be metallic or covalent network bonded, which does not readily dissolve in water.