For a hydrogen atom, the probability P(r) of finding the electron within a spherical shell with inner radius r and outer radius r + dr is given by equation P(r) dr = |psi|^2 4 pi r^2 dr. Part A For a hydrogen atom in the 1s ground state, at what value of r does P(r) have its maximum value? Express your answer using three significant figures r = ______ m Part B What is the ratio of your result to the distance between the electron and the nucleus for the n = 1 state in the Bohr model? r/a = 1.00