Question

Who proposed first the concept of an atom.
(a) John Dalton
(b) Democritus
(c) Robert Brown
(d) None of the above​

Answer 1

None of the above.

hope it helps you

please follow and mark as brainliest

Answer 2

Answer:

Democritus

Explanation:

The ancient atomic theory was proposed in the 5th century bc by the Greek philosophers Leucippus and Democritus and was revived in the 1st century bc by the Roman philosopher and poet Lucretius.