BBC Bitesize A simple model of an atom shows a nucleus orbited by a number of electrons In 1803, John Dalton's atomic theory brought them into scientific view, but the Manchester scientist was ...

The scientist John Dalton carried out a series of experiments ... He published his ideas in 1803. This atomic model has changed over time. Scientists used the model to make predictions.

John Dalton was born in 1766 in Cumbria, and worked for most of his life in Manchester. His achievements include: Developing atomic theory. This states that everything is made up of tiny particles ...

In 1803, John Dalton's atomic theory brought them into scientific view, but the Manchester scientist was clear that he agreed with the Ancient Greeks and believed they could not be broken into simpler ...