1. The problem statement, all variables and given/known data A Hydrogen atom is in a state with n=2? 2. Relevant equations r=an^2 a=.0529 nm 3. The attempt at a solution I am confused by my book it says that the radius of a stationary state is r=.0529*2^2=.2116 but I disagree isn't the stationary state n=1 which would mean the radius is .0529 nm. I thought n=2 is the first excited state in a hydrogen atom am I wrong?