How has atomic theory evolved over time?

Can you explain how atomic theory has changed since its inception?

Sure! Atomic theory has evolved from early ideas by Democritus to Dalton's solid sphere model, then to Thomson's plum pudding model, and later to Rutherford's nuclear model. Today, we understand atoms as complex structures with protons, neutrons, and electrons.

What were the key experiments that led to these changes?

Key experiments include Rutherford's gold foil experiment, which revealed the nucleus, and Thomson's cathode ray tube experiment, which discovered electrons. These experiments challenged previous models and led to the development of the modern atomic model.

How did quantum mechanics influence atomic theory?

Quantum mechanics introduced the concept of wave-particle duality and the uncertainty principle, fundamentally changing our understanding of atomic structure and behavior.

What are some modern applications of atomic theory?

Modern applications include nuclear energy, medical imaging techniques like PET scans, and advancements in materials science.