1911
Rutherford develops the "plum-pudding" model of the atom.
Marie Curie receives a second Nobel Prize, this time in Chemistry, for the isolation of radium and polonium and for her investigation of their chemical properties.
1913
Niels Bohr publishes theory of atomic structure combining nuclear theory with quantum theory.
1915
Albert Einstein publishes the general theory of relativity. The theory proposed that gravity, as well as motion, can affect the intervals of time and of space.
1919
June - Rutherford bombards nitrogen gas with alpha particles and obtained atoms of an oxygen isotope and protons. This transmutation of nitrogen into oxygen was the first artificially induced nuclear reaction.