Chemical elements

An atom is the smallest part of any element that can exist alone or combined with other particles. Accordingly, all atoms are elements, and there are more than a hundred natural elements. Accordingly, there are more than a hundred natural atoms. Atoms are the particles of matter that make matter what it is. It is natural, then, to assume that atoms are the basic and primary units of all matter in the universe, and for more than a hundred years they have actually been called that. They were ...