Photo: Niels Bohr's research notes for his new atomic theory Rutherford's ... of light emitted by real hydrogen atoms. Bohr's theory that electrons existed in set orbits around the nucleus was ...

He suggested that an atom was a tiny solid ball. He published his ideas in 1803. This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of ...

Moreover, the model was able to explain the hydrogen atom’s spectral lines ... It provided a framework for understanding atomic structure, which was essential for the later development of ...