Question

who first used the word “atomos” to describe the smallest unit of a substance?
thomson
democritus
bohr
schrödinger

Explanation:

Democritus, a Greek philosopher, first used the term "atomos" to describe the smallest, indivisible unit of a substance. Thomson is known for discovering the electron, Bohr for the Bohr model of the atom, and Schrödinger for the Schrödinger equation in quantum mechanics.

Answer:

B. Democritus