The nucleus has more than 100 protons and more than 150 neutons, the nucleus is a very small part of an atom. Both the atom and the necleus can be thought of as spheres. Then both volumes of the atom can be compared with the volume of the nucleus alone, because the volume of a sphere is proportional to the cube of its radius. The space outside the nucleus is occupied only by electrons. The observation has …showed first 75 words of 467 total…

…showed last 75 words of 467 total…mass of an element is the mass of the element expressed in grams. The particles of an atm can be identified by: the kind of charge a particle has, the amount of charge, and the mass of the particle. The atom of an elements are usually in a unexicited state. When gaseous are heat or electrically charged the electrons in the gaseous atoms absorb energy. Electromagnetic radiation is energy that travels though space as waves.