63. Assuming that the normalized wave function describing the 1s-state electron in a hydrogen atom is known ψ100 (r) = 1 / √ (πa3) er / a, determine the average value of the function 1 / r, taking into account that <1 / r> = ∫ (1 / rψ • ψdV).

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)