A system of atoms has energy levels uniformly spaced at 3.2x10 -20 J apart. The atoms do not interact with each other. The populations of the energy...

A system of atoms has energy levels uniformly spaced at 3.2x10-20 J apart. The atoms do not interact with each other. The populations of the energy levels are given by the Boltzmann distribution. 

(a) What fraction of atoms is in the ground state at temperature 300 K? 

(b) What fraction of atoms is in the first energy state at temperature 300 K?