1. The problem statement, all variables and given/known data The problem is attached in the picture. It is to normalize the wavefunction to find the value of A. 3. The attempt at a solution The solutions used an element volume dV of a very thin shell, then integrated r from 0 to ∞. I didn't think of this way, I simply integrated using boundaries of ψ, θ and r. The limits of ψ ranges from 0 to 2∏. The limits of θ ranges from 0 to 2∏. The limits of r ranges from 0 to infinity. However, I get a different answer. I've checked my working through a couple of times, not sure where I went wrong..