How did chemistry evolve after Dalton?

What were the major developments in chemistry after Dalton's atomic theory?

After Dalton, chemistry evolved significantly with the introduction of the periodic table by Mendeleev, the discovery of electrons by J.J. Thomson, and the development of quantum chemistry. These advancements helped refine atomic theory and our understanding of chemical bonding.

How did the periodic table change our understanding of elements?

The periodic table organized elements by their atomic number and properties, revealing patterns in their behavior. This organization allowed chemists to predict the existence and properties of undiscovered elements, fundamentally changing the study of chemistry.

What role did J.J. Thomson play in the evolution of atomic theory?

J.J. Thomson discovered the electron, which challenged Dalton's solid atomic model. His work led to the realization that atoms are not indivisible and introduced the concept of subatomic particles, paving the way for modern atomic theory.

Can you explain the significance of quantum chemistry?

Quantum chemistry applies quantum mechanics to chemical systems, providing a deeper understanding of molecular structures and reactions. It explains phenomena that classical chemistry cannot, such as electron behavior in atoms and the nature of chemical bonds.