Plot[(4*r^2)/(0.53*10^(-11))^3*Exp[(-2*r)/(0.53*10^(-11))], {r, 0, 5*10^(-11)}]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.