1.) Show that the SI units for Planck's constant (h) are equal to the SI units of angular momentum.
2.) Calculate the magnitude of the Bohr radius.
3.) Calculate the speed of the electron moving in an orbit whose radius is equivalent to the Bohr radius.
4.) How much energy does it take to ionize a hydrogen atom in its ground state? That is, how much energy has to be supplied to move an electron from the n=1 level to the n=(infinity) level?