An carly model of the atom, proposed by Rutherford after his discovery of the atomicnucleus, had a positive point charge +Ze (the nucleus) at the center of a sphere ofradius R with uniformly distributed negative charge -Ze. Z is the atomic number, thenumber of protons in the nucleus and the number of clectrons in the negative sphere.(a) Show that the clectric ficld inside this atom isZeEin =1r2R3(b) What is E at the surface of the atom? Is this the expected value? Explain.(c) A uranium atom has Z92 and R = 0.10 nm. What is the clectric ficld strength%3Dat r =

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