U Can: Chemistry I For Dummies. Hren Chris

       Narrowing the focus to the nucleus

      The last column in Table 3-1 lists the locations of the three subatomic particles. Protons and neutrons are located in the nucleus, a dense central core in the middle of the atom. Because they’re always found in the nucleus, they’re sometimes called nuclear particles. Electrons move around the nucleus in a cloud of many different energy levels and are discussed at great length in Chapter 4.