Photo: Niels Bohr's research notes for his new ... Or the electrons could be knocked out of position if a charged particle passed by. Bohr turned to Planck's quantum theory to explain the ...

Niels Bohr was born and educated ... a dual nature (as the electron is both particle and wave) but we can only experience one aspect at a time. In 1912 Bohr married Margrethe Nørlund.

In 1927, Werner Heisenberg was in Denmark working at Niels ... Bohr developed complementarity theory. This stated that there was a dual nature to things -- an electron was a wave and a particle ...

In 1913, Niels Bohr revised ... number of the atom and the atomic mass. Bohr and other scientists knew that there also had to be a neutral particle the same size as a proton to keep the nucleus ...