The study of energy radiated from heated solids, and how energy behaved like particles in the form of tiny discrete energy packets or bundles called quanta. Waves could also behave like particles, with definite boundaries and bounced off each other when collided like particles do.
1) All matter is composed of extremely small particles called atoms that can’t be destroyed or created
2)Atom of any element are identical to one another
3)Atoms of different elements combine in specific ratios to form compounds
4)Chemical reactions,atoms are separated,rearranged,and recombined to form new compounds