Dalton's atomic theory is often described using which model?

• A. Plum Pudding Model
• B. Billiard Ball
• C. Nuclear Model
• D. Electron Cloud

Answer: (B)

Dalton thought of atoms as tiny, indivisible, solid spheres that combine in whole-number ratios to build substances. The billiard ball model fits that idea because it pictures each atom as a hard, uniform particle that cannot be broken into smaller parts in Dalton’s view. The Plum Pudding Model, Nuclear Model, and Electron Cloud came from later experiments and describe different internal structures, not Dalton’s original concept of atoms as simple, solid spheres. So the billiard ball description best matches Dalton’s atomic theory.