Structure of the Atom

These questions cover the atomic structure skills that school trial papers test again and again: cathode ray evidence, Thomson's velocity selector and charge-to-mass ratio, Millikan's oil drops, Rutherford's gold foil and Chadwick's neutron. Use $q_e=1.602\times 10^{-19}$ C and $m_e=9.109\times 10^{-31}$ kg. They start easy and get harder. Stuck? Tap Show a hint for one step at a time.