Can anyone help me with the particle model of matter timeline?
John Dalton propsed the idea of atoms in their current form – as the smallest indivisible units of an element – this was in 1803.. In 1897, J.J Thompson discovered the electron. In 1911, Rutherford found that the atom consisted of a central dense nucleus, surrounded by electrons. Chadwick discovered the neutron in 1932. Incidently, all of the above either studied or worked at Manchester – which is how I came to be researching them yesterday! After that, many other particles were discovered, including quarks. For a while things got a bit messy, but in the early 70s the Standard Model was proposed, which explained how all the particles related to each other. There’s still one missing – the Higgs Boson, which will hopefully be seen for the first time very soon (pmaybe in 2008!).
