The Structure of the Atom

The Structure of the Atom

1. Structure

   • Nucleus (contains at least one proton and one or more neutrons)
   • Electrons (surround the nucleus).

2. Atoms

   • Are the smallest particle of an element that retains the chemical properties of that element.

3. Electrons

   • A stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

4. Cathode Rays and Electrons

   • Investigators noticed that when current was passed through the tube, the surface of the tube directly opposite the cathode glowed. The ray traveled from te cathode to the anode when current was passed through the tube.
   • They hypothesized that the glow was caused by a stream of particles.