In 1803, John Dalton's atomic theory brought them into ... presented a planetary model of the atom in 1911. In it, he laid out how atoms have a central, positively charged nucleus with electrons ...

The scientist John Dalton carried out a series ... Changes to the atomic model Atoms can be broken down into smaller parts. An atom is made of tiny negatively charged electrons dotted about ...

There was little change in the understanding of the atom until John Dalton (1766-1844), an English ... In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons orbited ...