The scientific model that explains the behavior of very small particles is the quantum model, or quantum mechanics. This model describes the physical properties of matter and energy on the atomic and subatomic levels. Unlike classical physics, which is deterministic, quantum mechanics incorporates probabilities and the wave-particle duality of particles like electrons. This model is fundamental in explaining various phenomena, such as atomic structure and chemical bonding, and has led to many technological advancements, including semiconductors and lasers.