In nature, free
charged particles do exist like in upper strata of atmosphere called the
ionosphere However, in atoms and molecules, the negatively charged
electrons and the positively charged nuclei are bound to each other and
are thus not free to move Bulk matter is made up of many molecules, a
gram of water, for example, contains approximately 1022 molecules These
molecules are so closely packed that the electrons are no longer attached
to individual nuclei