1. The problem statement, all variables and given/known data A hydrogen atom exists in an excited state for typically 5.79 ns. How many revolution would an electron make in the n=2 state before decaying? 2. Relevant equations L=m*v*Rn=h(bar)*n w=v/Rn Rn=n^2*Ao Ao=.053 nm 3. The attempt at a solution Rn=4*.053=.212 nm (don't know what purpose this serves) v=2*1.0546E-34/(1.6727E-27*.212E-9) v= 594.8 m/s distance= v*t d= 594.8*5.79E-9s= 3.444 E-6 m circumfrance- 2*pi*r= 2*3.14*.212E-9m=1.332E-9 m d/circumfrance= 2585.5 revolutions This is wrong, can someone help me?