Ions are atoms, ions, or molecules that contain an unequal number of protons and electrons, resulting in a net positive or negative electrical charge. While ions play a key role in a variety of chemical processes, there are some common misconceptions about them. Let’s take a look at which of the following statements about ions is incorrect.

Ions Cannot Exist Without Atoms

This statement is false. Ions can exist without atoms, meaning they can be formed from molecules that have been split apart. For example, when water molecules undergo electrolysis, they split into their component hydrogen and oxygen ions, which are then free to bond with other ionic species.

Positively-Charged Ions Repel Other Positively-Charged Ions

This statement is also false. Positively-charged ions actually attract other positively-charged ions, and similarly for negatively-charged ions. This phenomenon is known as “ionic bonding” and is a key process in the formation of many chemicals.

Ions Make All Substances Conductive

This statement is incorrect. While ions are present in many conductive substances, they are not the only components that allow for electrical conduction. Other types of materials, such as graphite, are also conductive even though they do not contain any ions.

Ionic Compounds Are Soluble in Water

This statement is false. While some ionic compounds are soluble in water, such as sodium chloride (NaCl), others are insoluble, such as calcium carbonate (CaCO₃). The solubility of an ionic compound depends on the charges of the ions and the polarity of the solvent.

In conclusion, the statement “Ions cannot exist without atoms” is false, as ions can exist without atoms. Additionally, positively-charged ions attract other positively-charged ions, not repel them, and ions are not the only components that make a substance conductive. Finally, not all ionic compounds are soluble in water, as some are insoluble.