The structure of the atom - CCEA. Part of Physics (Single Science) Unit 1: Atomic and nuclear physics. Save to My Bitesize Save to My Bitesize Saving Saved Removing Remove from My Bitesize.

The heart of an atom. You can think of atoms as composed of "shells." Each shell is filled with varying portions of negatively charged electrons "buzzing" around; the outermost shell is known as ...