An atom has a very small nucleus surrounded by an electron “cloud.” Figure 2.1 represents the nucleus with a diameter of about 2 mm and describes the electron cloud as extending over 200 m. If the diameter of an atom is 1 × 10⁻⁸ cm, what is the approximate diameter of its nucleus?

In Figure 2.1

Transcribed Image Text:

Nucleus with protons (positive electric charge) and neutrons (no electric charge). Electrons (negative electric charge). The number of electrons and protons is equal in an electrically neutral atom.