The plum pudding model of the
atom by the scientist Sir Joseph John Thompson or J.J. Thompson. It was
theorized after the discovery that electrons are present in the atom. In this
model, the atom is composed mainly of electrons. It was describe as plum
pudding because the electrons are dispersed within the atom. John Dalton
discovered the atom. Ernest Rutherford discovered the half – life of an atom
and Neils Bohr explain the quantum mechanics. So the answer is J.J. Thompson.
