Question

Name the scientists who were responsible for the following scientific development:
The theory is that all substances are composed of tiny, structureless hard indestructible particles.

Answer 1

Atomic theory:

1. John Dalton proposed an atomic theory that is now widely recognized.
2. It is one of the most important scientific theories.
3. He proposed that all substances or matter are made up of small indivisible particles known as atoms, which he imagined as "solid, massy, hard, impenetrable, moving particles".
4. This theory is known as Dalton's atomic theory.

Hence, the theory that all substances are composed of tiny, structureless hard indestructible particles was given by the scientist John Dalton.