isotope that has 63 protons & 81 neutrons ey eur opium -81 b) thallium -81 ( ) thallium - cup J ) europium -14y Identity various atomic models in order of sophistication Bohr model, Rutherford Model, wave mechanical, Thompson 10 ) Bohr, Rutherford, Thompson, wave mechanical () Thompson, Bohr, Rutherford, wave men Particles enter here D Identify the track by a proton