For a summary of the theory just previous to the development of the new methods the reader is referred to a lecture of the author, Atomic Theory and Mechanics,œ published In this periodical ...

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.

Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came ... bold application of new ideas paved the way for the development of quantum mechanics. Bohr went on to ...