Introduction to the Atom

Intro to Atoms

By convention there is color,
by convention sweetness,
by convention bitterness,
but in reality there are atoms and space.

-Democritus (400 BC)

However, experiments which "looked" into an atom using particle probes indicated that atoms had structure and were not just permeable balls.
These experiments helped scientists determine that atoms had a positive, dense nucleus and a cloud of electrons (e) .