Question

Thomson's concept of the electron

Answer 1

What bout it?

Answer 2

Here is his theory.
Theories about the atom proliferated in the wake of Thomson's 1897 work. If Thomson had found the single building block of all atoms, how could atoms be built up out of these corpuscles? Thomson proposed a model, sometimes called the "plum pudding" or "raisin cake" model, in which thousands of tiny, negatively charged corpuscles swarm inside a sort of cloud of massless positive charge. This theory was struck down by Thomson's own former student, Ernest Rutherford. Using a different kind of particle beam, Rutherford found evidence that the atom has a small core, a nucleus. Rutherford suggested that the atom might resemble a tiny solar system, with a massive, positively charged center circled by only a few electrons. Later this nucleus was found to be built of new kinds of particles (protons and neutrons), much heavier than electrons.