Draw and explain the atomic structure of one atom of Chlorine.

The answer would include a dot-and-cross diagram, displaying at the centre, a nucleus/the chemical symbol for chlorine, followed by three electron shells, the first containing two electrons, the second eight, and the third seven. The explanation would include the knowledge that as an atom of Chlorine has 17 electrons, the outer shell will not be filled, as electronic configuration dictates that the first shell contains 2 electrons, and all subsequent shells contain eight.