Bill Nye explains that an atom is composed of protons, neutrons, and electrons. Protons and neutrons are found in the nucleus and have a positive and a neutral charge, respectively. Electrons, taking on a negative charge, move around the nucleus. Bill Nye demonstrates that an atom is mostly empty space by illustrating the distance between the nucleus and the electrons.
This clip takes us into the microscopic world through a series of steps, with each step being 10x smaller than the previous. It illustrates the microorganisms that exist in drop of water and the components of those organisms, including DNA and atoms.
Starting from the hand of a sleeping man at a picnic, this clip investigates the structure of a cells in the hand and goes into more granular details to the scale at which the makeup of a single carbon atom is investigated.