"On top of that, for many decades they thought that the nucleus in the center of the atom was solid but it turns out that atoms are like tiny soap bubbles made of 99.999% empty space inside the outter shell and that shell is not solid either but made of an electromagnetic field so we could "in theory", pass our hands through an atom and not touch something solid. "
A nice discussion of atoms and stuff.
"The diversity of chemical behavior results from only about 100 different elements and, thus, only 100 different kinds of atoms. In a sense, the atoms are like the 26 letters of the alphabet that join together in different combinations to form the immense number of words in our language. But how do the atoms combine with each other? What rules govern the ways in which they can combine? How do the properties of a substance relate to the kinds of atoms it contains? Indeed, what is an atom like, and what makes the atoms of one element different from those of another? "
"A more accurate depiction of an atom, showing it is mostly empty space (grey area) traversed by rapidly moving electrons (blue dots, drawn much larger than to scale) with the heavy nucleus (red and white dot at center, drawn larger than to scale) at center. Its shape is like that of a rural community, with expanses of uninhabited land, a few scattered farm houses, and a small village with closely packed houses at its center."
See the link for a realistic description of an atom.
"an atom hitting a moving piston is like a ping-pong ball hitting a moving paddle." The link is whole book on using analogy and metaphor in teaching science.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.