Answer:
ORIGIN OF ATOM.
Sometimes peoples like to say that atom is like a cell in living things,is it true?comment below,letss goo!!
Step-by-step explanation:
A greek philosopher known as Democritus was the first to consider the idea that matter is made up of small particles ,about 400BC.
Since there was no experimental evidence to support his idea,it was not accepted.
About 2000 years later an English man called John Dalton revived the discussion.He used experimental evidence to support his idea to convince people that matter is made up of particles called atoms.It accepted!.