Rutherford : …………….. :: JJ Thomson : Watermelon

Compare Rutherford and Thomson's models of the atom on the following basis : 1) Where is the positive charge placed?

Use the following terms to create a concept map atom, nucleus, protons, neutrons, electrons, isotopes, atomic number, positively charged, negatively charged, neutral, Rutherford, J.J. Thomson, Goldstein, Chadwick

Nature of the parabolic trajectory of the +VE ions in the J.J. Thomson experiment

{:(1. "Discovered the cathode rays " , (a) "E. Goldstein"), ( 2. "Discovered the protons", (b) "J.J. Thomson" ), (3. "Discovered the neutrons ", (c ) "William Crookes") , (4. "Plum pudding model",(d) "Lord Rutherford" ) , ( 5. "Planetary model of an atom ", (e ) "James Chadwick"):}

According to J.J. Thomson, an atom could be through of as

Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better. (a) Is the average angle of deflection of a-particles by a thin gold foil predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?