what law or theory explains that all substances are made of particles?

The Laws of the United States.

If anyone mess with it, then the US would blow up everything into particles, proving the statement is true.

In physics, quantum mechanics is the learn of the dating between potential quanta (radiation) and depend, in specific that between valence shell electrons and photons. Quantum mechanics is a mandatory and mandatory branch of physics with huge purposes in the two experimental and theoretical physics. Quantum theory generalizes all classical theories, including mechanics, electromagnetism (different than regularly occurring relativity), and can provide precise descriptions for many previously unexplained phenomena which includes black physique radiation and strong electron orbits.the end results of quantum mechanics are in many circumstances no longer observable on macroscopic scales, yet become glaring on the atomic and subatomic point.