Making an Atom

          During class, I made a scale model of a sodium atom.  The scale was 250 picometers/cm.  The only things that were not modeled to scale were the electrons.  Electrons are supposed to be 2000 times smaller than a proton or neutron, but the electrons I made were probably only about 100 times smaller.  There is a picture of my atom to the right.  As you can see, the neutrons and protons are showed separately in different shades of green, and the electrons are laid out in levels like a Bohr model.