According to Richard Feynman,matter is made of which constituent particles? Why is it important? Write the atomic hypothesis.

(N/A) According to Richard Feynman,matter is made up of atoms.
This is significant because if mankind does not use this knowledge wisely,there is a chance of extinction or suffering annihilation.
This could be due to a nuclear catastrophe or an environmental disaster.
Atomic Hypothesis: All things are made of atoms. These are little particles that move around in perpetual motion. They attract each other when they are at a little distance apart but repel when they are squeezed into a very small space.
Historically,Kanad in India and Democritus in Greece suggested that matter might consist of indivisible constituents.