Answer :
Answer:
Democritus
Explanation:
Democritus first introduced the idea of the atom almost 2500 years ago. Democritus was an important philosopher however if your talking about how the atom is today look at first rudimentary pudding model by JJ Thomson first design then its Neils Bohr whos model we look at today
John Dalton was the first to adapt Democritus' theory into the first modern atomic model. J.J Thomson was a physicist who is credited for discovering the electron. He used his research on cathode ray tube technology in this discovery.