Concentrated in a small dense region nucleus protons

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concentrated in a small, dense region Nucleus (proton(s) and neutron(s) ~10 -18 cm electron: “orbits” the nucleus electron: orbits the nucleus “multielectron atoms” have more than one e- “orbiting” the nucleus 10 13 S. Ensign, Atomic structure & nomenclature 13 ~10 -13 cm Diameter of atom ~ 10 -8 cm (~1-5 Å) The electron is ~1000 times smaller in size than the proton, but occupies a space ~10,000-100,000 times greater than the size of the nucleus Golf ball nucleus on 50 yard line (2 cm diameter) The stadium ( 200 m diameter) represents the space in which the electron(s) reside! S. Ensign, Atomic structure & nomenclature 14 How small is an atom??? Density of a nucleus? Nucleus (proton(s) and neutron(s) p+ p+ n p+ n electron: “orbits” the nucleus p n p+ n S. Ensign, Atomic structure & nomenclature 15 Like forces repel, opposites attract, so… What holds the nucleus together? Why don’t the electrons fall into the nucleus?? nucleus?? Nucleus (proton(s) and neutron(s) p+ n n electron: “orbits” the nucleus S. Ensign, Atomic structure & nomenclature 16 p+ n p+ p+ n
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