or no valency at all. No atomic model, so far as I know, has succeeded in making this difference plausible; but it is not essential to the hypothesis, that, independently of any atomic model:—(i ...

He concluded that all matter was made of tiny particles called atoms. He suggested that an atom was a tiny solid ball. He published his ideas in 1803. This atomic model has changed over time.

In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons ... However, there was still a difference between the atomic number of the atom and the atomic mass.

Get Instant Summarized Text (Gist) The atomic nucleus of lead-208, previously thought to be perfectly spherical, has been found to be slightly elongated, resembling a prolate spheroid. This ...