Who are the key figures in atomic theory?

Who are the key figures in atomic theory?

The key figures in atomic theory include John Dalton, J.J. Thomson, Ernest Rutherford, and Niels Bohr. Would you like to know more about any of them?

Tell me about John Dalton's contributions.

John Dalton is known for proposing the first modern atomic theory in the early 19th century, which included the idea that each element is made of atoms of a single, unique type.

What did J.J. Thomson discover?

J.J. Thomson discovered the electron in 1897, which led to the understanding that atoms are not indivisible but contain smaller particles.

How did Rutherford change the atomic model?

Ernest Rutherford conducted the gold foil experiment, which led to the discovery of the atomic nucleus and changed the atomic model from a solid sphere to one with a dense center.

Can you explain Niels Bohr's model?

Niels Bohr proposed a model of the atom where electrons orbit the nucleus in specific energy levels, introducing the concept of quantized energy states.