There are many properties of matter, which are related to their surface. Such properties become predominant if the substance is in finely divided form or its surface is rough. Under these conditions the surface area increases enormously and large amount of material is present in the surface. The surface related properties of matter are adsorption, colloidal state and emulsions. The branch of chemistry which deals with the study of composition of atomic nucleus and the nuclear transformations is known as nuclear chemistry”. The common examples of nuclear processes are radioactivity, artificial transmutations, nuclear fission and nuclear fusion. The nuclear is also an important aspect of chemistry because the energies involved in some of these are million times greater than those in ordinary chemical reactions. Do check out Chemistry Questions of other chapters too.