If you were a scientist and you had to explain the concept of what an atom is, How would you do it? Why ?

Answer 1

I would compare them to something like Legos. Really tiny, so small you can't see them, Legos. Little pieces that are somewhat similar but can be different. They all fit together in specific ways that can build something.

Answer 2

I would avoid the use of technical jargon, to make things clearer, and instead use terms like eensy and teeny-weeny...