Hi guys, I know that if we consider a basic atomic model ( not considering quantum mechanics here) that an atom is mostly empty space ( 99.99999%) or something like that. But how about the space between the atoms? Would it be appropriate to tell middle school students...8th graders... that there is more space between atoms than the space the atoms take up themselves ( in typical solids, liquids, and gases)? Again, I want to reiterate I am introducing them to a crude marble model and speaking of only water "particles" or gold "particles", but they don't understand that "nothing" exist in the spaces between these atoms i.e they think it is filled with air. Again, can I say that there is more space between these atoms than the space the atoms takes up themselves? I want to reiterate these are eight graders who believe air fills the gaps between gold atoms, for example.