Question

Who originally described atoms as small, indivisible spheres?

Answer 1

See this old answer............

Explanation:

You speak of Democritus, a 6th century BC Greek.

Why was Democritus' early idea of atomism abandoned? Well, basically his musings were purely on a philosophical basis, and he performed no experiments (so far as we know) on which he could base, and test his ideas.

The very word `"atom"`, comes from the Greek, `alphatauomuos`, which means `"uncuttable"`, or `"indivisible"`. Of course, we know now that the atom is NOT indivisible.