The wavefunction of the 1s electron in a Hydrogen atom is er/a0 , where a0 is the Bohr radius corresponding to 0.529177A and is the normalization constant. Express in terms of a0 and find the value of it. [Hints: The probability of normalized wavefunction over all space is 1. Use Jacobian determinant for the whole space integral. When doing the integration by parts, note that for exponential function f(x) = e x , fdx = df.]