Answer:
In a world where elements exist but are unable to form chemical bonds with each other, the most basic and purest form of elements would exist as individual atoms or ions. There would not be any molecules or compounds since the atoms would not be able to bind with each other.
Substances that could not exist in this world would be those that are composed of chemical bonds, such as gases, liquids, or solids. This would include common substances such as water, air, and most organic materials.
In this world, there would not be any reactions or chemical processes as the atoms would not be able to interact with each other. This would result in a world that is still and unchanging, with no movement or life. It would be a world of individual atoms and ions, floating aimlessly in a void. This world would be inhospitable to life and would not support any kind of chemical or biological processes.