Ai
Created page with "== Introduction == An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers. They are so small that accurately predicting their behavior using classical physics—as if they were tennis balls, for instance—is not possible due to quantum effects. == Structure == Atoms consist of a dense..."
